Knowledge Management in Software Engineering: A Systematic Review of Studied Concepts, Findings and Research Methods Used
Knowledge Management in Software Engineering: A Systematic Review of Studied Concepts, Findings and Research Methods Used
Knowledge Management in Software Engineering: A Systematic Review of Studied Concepts, Findings and Research Methods Used
1 Postprint of: Bjørnson, F. O., & Dingsøyr, T. (2008). Knowledge Management in Software Engineering: A Systematic Review
of Studied Concepts and Research Methods Used. Information and Software Technology, 50(11), 1055-1168.
doi:10.1016/j.infsof.2008.03.006
https://www.sciencedirect.com/science/article/abs/pii/S0950584908000487
Released under Creative Commons Attribution Non-Commercial No Derivatives License.
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1. Introduction
Software engineering is a knowledge-intensive activity. For software organisations,
the main assets are not manufacturing plants, buildings, and machines, but the
knowledge held by the employees. Software engineering has long recognized the need
for managing knowledge and the community could learn much from the knowledge-
management community, which bases its theories on well-established disciplines such
as cognitive science, ergonomics, and management.
1. What are the major knowledge management concepts that have been
investigated in software engineering?
2. What are the major findings on knowledge management in software
engineering?
3. What research methods have been used within the area so far?
Our target readership is three groups that we think will be interested in an overview of
empirical research on knowledge management in software engineering: (1)
researchers from software engineering who would like to design studies to address
important research gaps, and identify relevant research methods; (2) researchers on
knowledge management in general, who would be interested in comparing work in
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the software engineering field to other knowledge-intensive fields; and (3) reflective
practitioners in software engineering, who will be interested in knowing what
knowledge management initiatives have been made in software companies, or quickly
identifying relevant studies, and the major findings and implications from these.
2. Background
In this chapter, we first give a brief background on knowledge management, then give
an overview of theories often referred to in the knowledge management literature.
Finally, we give an overview of existing work on knowledge management in software
engineering.
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Hanssen et al. [55] refer to two main strategies for knowledge management:
• Codification – to systematise and store information that constitutes the
knowledge of the company, and to make this available to the people in the
company.
• Personalisation – to support the flow of information in a company by having a
centralised store of information about knowledge sources, like a ”yellow
pages” of who knows what in a company.
Earl [44] has further classified work in knowledge management into schools (see
Table 1). The schools are broadly categorized as “technocratic”, “economic” and
“behavioural”. The technocratic schools are 1) the systems school, which focuses on
technology for knowledge sharing, using knowledge repositories; 2) the cartographic
school, which focuses on knowledge maps and creating knowledge directories; and 3)
the engineering school, which focuses on processes and knowledge flows in
organizations.
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There are a number of overview articles of the knowledge management field in the
literature. In the following we describe overview articles from management science
and information systems.
In the information systems field, Alavi and Leidner [3] summarize literature from
different fields, which is relevant to research on knowledge management systems.
One of the major challenges in KM according to them is to facilitate the flow of
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knowledge between individuals so that the maximum amount of transfer occurs. They
also conclude that no single or optimal solution to organizational knowledge
management can be developed. Instead a variety of approaches and systems needs to
be employed to deal with the diversity of knowledge types. Knowledge management
is not a monolithic but a dynamic and continuous phenomenon.
Argote et al. [7] conclude a special issue of Management Science with an article that
provides a framework for organizing the literature on knowledge management,
identifies emerging themes, and suggests directions for further research.
Many have been critical to the concept of knowledge management, and in particular
to the use of information technology in knowledge management. Hislop [56]
questions the distinction between tacit and explicit knowledge. If explicit knowledge
cannot be managed independently, this means that information technology will have a
smaller part in knowledge management. This critique is also supported by McDermot,
[85] who argues that “if people working in a group don’t already share knowledge,
don’t already have plenty of contact, don’t already understand what insights and
information will be useful to each other, information technology is not likely to create
it”. In addition, Swan et al. [114] criticize the knowledge management field for being
too occupied with tools and techniques. They claim that researchers tend to overstate
the codifiability of knowledge and to overemphasize the utility of IT to give
organizational performance improvement. They also warn that “codification of tacit
knowledge into formal systems may generate its own pathology: the informal and
locally situated practices that allow the firm to cope with uncertainty may become
rigidified by the system”.
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Kolb describes learning from experience (“experiential learning”, see [70]) as four
different learning modes that we can place in two dimensions. One dimension is how
people take hold of experience, with two modes, either relying on symbolic
representation – which he calls comprehension, or through “tangible, felt qualities of
immediate experience”, which he calls apprehension. The other dimension is how
people transform experience, with two modes, either through internal reflection,
which he refers to as intention, or through “active external manipulation of the
external world”, which he calls extension.
Kolb argues that people need to take advantage of all four modes of learning to be
effective, they “must be able to involve themselves fully, openly, and without bias in
new experiences; reflect on and observe these experiences from many perspectives;
create concepts that integrate their observations into logically sound theories; and use
these theories to make decisions and solve problems” [71].
Argyris and Schön distinguish between what they call single and double-loop learning
[9] in organisations. In single-loop learning, one receives feedback in the form of
observed effects and then acts on the basis solely of these observations to change and
improve the process or causal chain of events that generated them. In double-loop
learning, one not only observes the effects of a process or causal chain of events, but
also understands the factors that influence the effects [8].
One traditional view of learning is that it is most effective when it takes place in a
setting where you isolate and abstract knowledge and then “teach” it to “students” in
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For individuals: learning takes place in the course of engaging in, and contributing to,
a community.
For communities: learning is to refine the practice.
For organisations: learning is to sustain interconnected communities of practice.
Nonaka and Takeuchi [90] claim that knowledge is constantly converted from tacit to
explicit and back again as it passes through an organisation. By tacit knowledge [94]
we mean knowledge that a human is not able to express explicitly, but is guiding the
behaviour of the human. Explicit knowledge is knowledge that we can represent in
textual or symbolic form. They say that knowledge can be converted from tacit to
tacit, from tacit to explicit, or from explicit to either tacit or explicit knowledge. These
modes of conversion are described as follows:
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There are many approaches to how software should be developed, which also affect
how knowledge is managed. A main difference between methods here is if they are
plan-based or traditional, which rely primarily on managing explicit knowledge, or
agile methods, which primarily rely on managing tacit knowledge [88].
In software engineering, there has been much discussion about how to manage
knowledge, or foster “learning software organisations”. In this context, Feldmann and
Althoff have defined a “learning software organisation” as an organisation that has to
“create a culture that promotes continuous learning and fosters the exchange of
experience” [50]. Dybå places more emphasis on action in his definition: “A software
organisation that promotes improved actions through better knowledge and
understanding” [41].
In software engineering, reusing life cycle experience, processes and products for
software development is often referred to as having an “Experience Factory” [13]. In
this framework, experience is collected from software development projects, and are
packaged and stored in an experience base. By packing, we mean generalising,
tailoring, and formalising experience so that it is easy to reuse.
The May 2002 issue of IEEE Software [77] was devoted to knowledge management
in software engineering, giving several examples of knowledge management
applications in software companies. In 2003, the book “Managing Software
Engineering Knowledge” [40] was published, focusing on a range of topics, from
identifying why knowledge management is important in software engineering [78], to
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Several PhD thesis have also been published on aspects of knowledge management
that are related to software engineering [16, 18, 36, 117].
Despite of the previously published overviews of the field, there is still a lack of broad
overviews of knowledge management in software engineering. Our motivation for
this study was thus, to give a more thorough and broader overview in the form of a
systematic review. This study also covers recent work, and assesses the quality of the
research in the field.
3. Method
The research method used is a systematic review [66], with demands placed on
research questions, identification of research, selection process, appraisal, synthesis,
and inferences. We now address each of these in turn.
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The aim of the study was to provide an overview of the empirically studied methods
for knowledge management in software engineering, answering the research questions
listed in Section 1.
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In addition, we identified two arenas that, to our knowledge, are the only ones that
pertain specifically to knowledge management in software engineering: the workshop
series on Learning Software Organisations (LSO) from 1999 until 2006, and the book
Managing Software Engineering Knowledge [10]. We searched all proceedings from
the workshop series and included all chapters from the book.
We performed the search in August 2006, which means that publications up to and
including the first quarter of 2006 are included, but some studies in the second quarter
might not have been indexed in the databases.
The identification process yielded 2102 articles. This formed the basis for the next
step in our selection process.
After this we obtained the abstract of these articles and both authors read through all
abstracts, with the following exclusion criterion.
• Exclude if the focus of the paper is clearly not on software engineering
• Exclude if the focus of the paper is clearly not on knowledge management
• Exclude if the method, tool or theory described is not tested in industry
To narrow the search further we also decided to focus on technical and process
knowledge (thus, “software engineering knowledge”). Hence, we also used the
criterion
• Exclude if the focus of the paper is on domain knowledge
After each researcher had gone through the papers we compared results. Where we
disagreed as to whether to keep or remove a paper, we discussed the matter until we
reached agreement.
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This process reduced the number of articles to 133, and agreement between
researchers was ‘good’ (Kappa value of 0,655).
The full text for all 133 papers was obtained and both researchers read through all the
papers with the same criteria for exclusion in mind. The final number of papers
selected for the review was 68. The agreement between researchers at this stage was
“moderate” (Kappa value: 0,523).
3.5 Synthesis
For the synthesis, we chose to only use the papers classified as empirical studies in
our framework, in order to avoid problems associated with lessons learned reports
stemming from their lack of scientific rigor. We extracted concepts covered, main
findings and the research method for each article. One researcher (the first author)
focused on the studies in the technocratic schools, while the other researcher (the
second author) focused on the behavioural schools.
4. Results
Using the framework outlined in Section 3.4, we categorized the 29 empirical studies
and 39 reports of lessons learned in Table 3. For a complete listing of papers in each
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category, see the appendix. Within Earl’s framework, we found a heavy concentration
on the technocratic schools and a fair mention of the behavioural school. We did not
find any papers relating to the economic school with our search criterion. Within the
technocratic schools, systems and engineering stand out as areas that have received
much attention. Within the behavioural schools, organizational and strategic have
received the most attention.
Four of the empirical studies did not fit into Earl’s framework. These were classified
as studies on the impact of knowledge management initiatives and on knowledge
management per se. Thus, we ended up with 25 studies classified as empirical within
the framework. Of the 39 reports of lessons learned, two belonged to two categories,
which is why we ended up with a sum of 41 for the reports of lessons learned in the
table.
Table 3: Categorized articles
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Empirical studies 6 1 12 0 3 0 3 25
% distribution, empirical studies 24 4 48 0 12 0 12 100
Lessons learned reports 20 0 9 0 2 1 9 41
% distribution, lessons learned reports 49 0 22 0 5 2 22 100
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Empirical studies
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Figure 1: Publications by year
To obtain an overview of the research methods used within this field, we used the
classification presented in Glass et al. [52]. This was carried out on the 25 papers
classified as empirical studies. The result is presented in Table 4. See the appendix for
a complete listing of which paper was classified in which category.
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Systems 1 3 1 1 6
Cartographic 1 1
Engineering 1 8 1 2 12
Organizational 3 3
Strategic 1 2 3
Sum 3 14 2 1 5 25
% 12 56 8 4 20 100
In the following subsections, we present the concepts and main findings from the
empirical studies within the main knowledge management schools.
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4.1.1 Systems
As defined by Earl, the systems school is built on the underlying principle that
knowledge should be codified in knowledge bases. This is what Hansen et al. refer to
as the “codification strategy”, and what Nonaka and Takeuchi refer to as
externalization.
In [24], Chewar and McCrickard present their conclusions from three case studies
investigating the use of their knowledge repository. On the basis of their case studies,
they present general guidelines and tradeoffs for developing a knowledge repository.
In [20], Bjørnson and Stålhane follow a small consulting company that wanted to
introduce an experience repository. On the basis of interviews with the employees,
they draw conclusions about attitudes towards the new experience repository, and the
content and functionality preferred by the employees. Barros et al. [11] investigate
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how risk archetypes and scenario models can be used to codify reusable knowledge
about project management. They test their approach by an observational analysis in
industry. They also describe a feasibility study within an academic environment.
4.1.2 Cartographic
The principal idea of the cartographic school is to make sure that knowledgeable
people in an organization are accessible to each other for advice, consultation, or
knowledge exchange. This is often achieved through knowledge directories, or so-
called ”yellow pages”, that can be searched for information as required.
We found only one empirical paper within this school and no papers on lessons
learned. In [34], Dingsøyr et al. examine a skills management tool at a medium-sized
consulting company. They identify four major usages of the tool and point out
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implications of their findings for future or other existing tools in this category, see
Table 6.
4.1.3 Engineering
The engineering school of knowledge management is a derivative or outgrowth of
business process reengineering. Consequently it focuses on processes. According to
our classification, the largest amount of empirical papers came from this school. Two
major categories can be identified. The first contains work done by researchers who
investigate the entire software process with respect to knowledge management. The
second contains work done by researchers who focus more on specific activities and
how the process can be improved within this activity. Table 7 gives an overview of
concepts and findings for this school.
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limitations.
Managing Formal routines must be [27]
knowledge supplemented by collaborative,
through formal social processes to promote effective
routines dissemination and organizational
learning.
Mapping of Knowledge mapping can [54]
knowledge flows successfully help an organisation to
select relevant focus areas for
planning future improvement
initiatives.
Casual maps for risk modeling [2]
contributes to organizational
learning
Process for Creating a suitable environment for [32]
conducting reflection, dialogue, criticism, and
project reviews to interaction is salient to the
extract conducting of a postmortem.
knowledge The organizational level can only [101]
benefit from the learning of project
teams if the knowledge and
reasoning behind the process
improvements is converted into such
an explicit format that it can be
utilized for learning in
organizational level also.
Implications of The focus on the pure codified [86]
social interaction approach is the critical reason of
on knowledge Tayloristic team failure to
sharing effectively share knowledge among
all stakeholders of a software
project.
Increasing the level of reflection in [19]
mentor programs can result in more
double looped learning.
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both explicit and tacit knowledge are required, no matter what approach is pursued.
Segal [108] investigates organizational learning in software process improvement.
Using a case to initiate and implement a manual of best practice as a basis, she
observed that the ideal and actual scenarios of use differed and identified possible
reasons for the difference. In [51] Folkestad et al. studied the effect of using the
rational unified process as a tool for organizational change. In this case, it was used to
introduce development staff to a new technology and methodology. Folkestad et al.
concluded that the iterative approach of the unified process had obvious effects on
organisational and individual learning. The unified process also resulted in new
patterns of communication and a new division of labour being instituted, which had a
significant effect on the company. Wangenheim et al. [118] report on their
experiences of defining and implementing software processes. They confirm what
others have experienced, that it is possible to define and implement software
processes in the context of small companies in a beneficial and cost-effective way.
In the papers that focused on specific activities within the process, we identified four
major areas: formal routines, mapping of knowledge flows, project reviews, and
social interaction. Many of these processes are aimed at stimulating several ways of
learning, as, for example, Kolb suggests.
In [27] Conradi and Dybå report on a survey that investigated the utility of formal
routines for transferring knowledge and experience. Their main observation was that
developers were rather sceptical about using written routines, while quality and
technical managers took this for granted. Given this conflict of attitudes, they describe
three implications for research on this topic.
Hansen and Kautz [54] argue that if software companies are to survive, it is critical
that they improve continuously the services that they provide. Such improvement
depends, to a great extent, on the organization’s capability to share knowledge and
thus on the way knowledge flows in an organization. To investigate knowledge flow,
they introduced a tool to map the flows of organisational knowledge in a software
development company. Using their new method, they identify potential threats to
knowledge flows in an organisation. Also using flow diagrams, Al-Shehab et al. [2]
describe how learning from analyses of past projects and from the issues that
contributed to their failure is becoming a major stage in the risk management process.
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They introduce causal mapping as a method to visualise cause and effect in risk
networks. They claim that their method is useful for organisational learning, because
it helps people to visualise differences in perceptions.
In [32], Desouza et al. describe two ways of conducting project postmortems. They
stress that learning through postmortems must occur at three levels: individual, team,
and organization. The paper describes guidelines for when to select different kinds of
postmortem, depending on the context and the knowledge that is to be shared. The
authors also argue that postmortems must be woven into the fabric of current project
management practices. Salo [101] also studies postmortem techniques and concludes
that existing techniques lack a systematic approach to validating iteratively the
implementation and effectiveness of action taken to improve software processes. Salo
studies the implementation of a method to remedy this and observes that the
organisational level can only benefit from the learning of project teams if the
knowledge and reasoning behind the improvements to processes are converted into an
explicit format such that it can be utilized for learning at the organisational level.
In [86], Melnik and Maurer discuss the role of conversation and social interaction
effective knowledge sharing in an agile process. Their main finding suggests that the
focus on pure codification is the principal reason that Tailoristic teams fail to share
knowledge effectively. Moving the focus from codification to socialisation, Bjørnson
and Dingsøyr [17] investigated knowledge sharing through a mentor programme in a
small software consultancy company. They describe how mentor programmes could
be changed to improve the learning in the organization. They also identify several
unofficial learning schemes that could be improved.
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4.2.1 Organizational
The organizational school focuses on describing the use of organizational structures
(networks) to share or pool knowledge. These structures are often referred to as
“knowledge communities”. Work on knowledge communities is related to work on
communities of practice as described in Section 2.2. An overview of our findings
from this school is presented in Table 8.
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4.2.2 Strategic
In the strategic school, knowledge management is seen as a dimension of competitive
strategy. Skandia’s views are a prime example [113]. Developing conceptual models
of the purpose and nature of intellectual capital has been a central issue. An overview
of our findings from this school is presented in Table 9.
One important issue in the literature on knowledge management has been to identify
the factors that lead to the successful management of knowledge. Feher and Gabor
[49] developed a model of the factors that support knowledge management. The
model includes technological, organizational and human resource factors, and was
developed on the basis of data on 72 software development organizations that are
contained in the European database for the improvement of software processes.
Another issue of strategic importance is the processes that are in place to facilitate
learning. Arent and Nørjeberg [5] analysed three industrial projects for the
improvement of software processes, in order to identify the learning processes used.
They found that both tacit and explicit knowledge were important for improving
practice, and that improvement requires ongoing interaction between different
learning processes.
Trittmann [116] distinguish between two types of strategy for managing knowledge:
“mechanistic” and ”organic”. Organic knowledge management pertains to activities
that seek to foster innovation, while mechanistic knowledge management aims at
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Ravichandran and Rai [97] studied two models for how the embedding and creation
of knowledge influence software process capability. Embedding refers to the process
of employing knowledge in standard practices, for example through making work
routines, methods and procedures. They found support for a model where knowledge
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creation has an effect on process capability when the knowledge is embedded after it
is created. This means that knowledge has to be internalized before it can be used to
improve processes. The study was done as a survey of 103 Fortune 1000 companies
and federal and state government agencies in the US.
Desouza et al. [31] examined what factors contribute to the use of knowledge artefacts
in a survey of 175 employees in a software engineering organization. They
specifically looked at factors that govern the use of explicit knowledge. They found
that the following factors relate to the use of explicit knowledge: perceived
complexity, perceived relative advantage, and perceived risk.
5. Discussion
In this study, we have identified far more studies, particularly empirical studies, than
have been reported in previous assessments by Rus et al. [100], Lindvall [80] and
Dingsøyr and Conradi [37]. We have shown that although there are not many
empirical studies, except for in the systems and engineering schools, there are either
empirical studies or reports of lessons learned in all schools except the economic
school. Thus, research on knowledge management in software engineering seems to
be slowly gaining a broader focus, although research on knowledge management in
software engineering is still somewhat distanced from mainstream research on
knowledge management.
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We now discuss our findings. We begin with a discussion concerning our first two
research questions, then the third, outline implications for research and practice, and
end with a discussion of the validity of our study
In this discussion of what we found, we will also include a discussion of how relevant
we think these knowledge management schools are for software engineering.
Software engineering is a large field with several disciplines relevant to knowledge
management, for example software process improvement. One recent development in
software engineering, which has implications for knowledge management activities is
whether a company seeks to have agile development processes in place, or rely on
tradition development methods such as the waterfall process [88]. Agile software
development will focus mainly on knowledge management activities related to tacit
knowledge, while the traditional development processes will need activities related to
explicit knowledge. In the following, we will discuss the concepts identified in
research, and give our opinion on what we think are the most relevant research areas
to support agile and traditional software development.
The final selection of papers was divided between the technocratic and behavioural
schools, with an emphasis on the technocratic side. This was not surprising, given the
general focus of software engineering on the construction of tools and processes. We
did not find any examples of what Earl considers economic schools. The reason for
this can be twofold, either few software companies track their intellectual capital, or
there is little interest in reporting findings from such activities in software
engineering.
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systems and engineering schools, with barely any mention of the cartographic school.
The heavy focus on the systems school can be explained by the software engineering
field’s focus on implementing new tools [37]. For this school, there is a greater
number of lessons learned reports than empirical studies. The main concepts we
identified in this school were the development and use of knowledge repositories.
There was, however, little to no overlap between the identified papers.
As for findings in this school, there are two studies of the use of knowledge
repositories over time, which shows that such tools are actually in use, and have more
benefits than the obvious. In Section 2.1, we referred to critique of the codification
strategy, and especially a belief that knowledge repositories easily can generate
information junkyards. There is not any evidence to support such a claim in software
engineering, but we believe there is a heavy publication bias towards success stories.
But the cases described in this review shows that it is possible to successfully
implement knowledge repositories to work in software companies.
The engineering school is the school that received the most empirical attention,
according to our review. Again, we identified two main areas within this school: those
focusing on the entire software process and those focusing on particular activities
within the process. Within the papers focusing on specific activities, we identified
four main areas: formal routines, mapping of knowledge flows, project reviews, and
social interaction. As with the systems school, there is little or no overlap between the
empirical studies. A possible explanation for the heavy empirical focus within this
school is the close fit with work on the improvement of software development
processes.
For the findings on whole development process, we see that having an established
development process can both improve communication and learning, but we also see
that it is important to focus also on sharing tacit knowledge in order to change
practice.
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process guides, is that it is difficult to get such technology in actual use [39].
However, many companies have invested in such infrastructure, and this indicates that
we need a better understanding of the factors that lead to effective knowledge sharing
within these two schools.
That there are so few papers in the cartographic school is interesting. One possible
explanation is that the ”yellow pages” systems are considered ”simple” and
undeserving of attention. Earl refers to a number of consulting companies using this
school, including McKinsey and Bain (see [55]). However, as the lone study in
software engineering shows, such tools have uses other than the obvious, and can
stimulate learning both at individual and organizational level. One argument for this
school is that although it requires a technical infrastructure, the investment is low
because there is no need to codify knowledge. This is a school which is relevant for
agile software development, and because of the growing number of such development
practices as well as the low cost, we think this is a school which requires further
research. A counter-argument could be that tacit knowledge is not as relevant for
software development as explicit knowledge, but we see from research on agile
development that it is possible to develop high-quality software without making much
use of explicit knowledge management [110].
The three studies in the organizational school discuss the use of people networks in
software organizations. Two of the studies investigated the improvement of software
development processes. In Earl’s taxonomy, both intra- and interorganizational
communities are mentioned as examples. In the software engineering literature, we
only find studies made in single organizations. Also, a much debated topic in general
knowledge management is what actions management can take in order to support this
type of knowledge sharing, what some refer to as knowledge governance. How much
should be formal, and what should be left to employees to organize themselves?
As for relevance for software engineering, we believe that this school has the potential
to deliver inexpensive solutions for companies, although as the studies in software
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engineering indicate, there is a debate on whether such initiatives are best left to grow
by themselves or if the management should have an active involvement. For software
engineering, it could be useful with studies that address this strategy in relation to
specific challenges for software development, like challenges with new technology,
process improvement or understanding customer needs. This school is relevant for
organizations that run multidisciplinary projects, which we believe is the case for
most software companies, whether they do agile or traditional development.
As for the spatial school, no empirical studies on software engineering were found in
this category. The question is then: Is this something that could be relevant in a
software engineering setting? The role of open-plan offices has been studied in other
fields, and this is something that also should have an impact on how knowledge is
shared in software teams. Many of the agile development methods recommend open-
plan offices, and knowing more about what specific effects this has on software
development would be valuable.
The empirical studies in the strategic school focus on factors pertaining to successful
knowledge management, learning processes, and types of strategy for managing
knowledge. It was, perhaps, to be expected that there would not be many articles
discussing the strategic importance of knowledge in software engineering supported
by empirical findings, because its importance is assumed in most published works on
knowledge management in software engineering.
Of the 68 studies identified, 39 were reports of lessons learned and 29 were empirical
studies. Case studies constituted the largest number of empirical studies (see Table 4),
followed by field studies and action research. It is positive that the emphasis on
empirical studies has increased (see Figure 1). The apparent dip in 2006 is due to the
time at which the search was conducted. We searched the databases in August and
most compilers of databases take some months to index their papers; hence, we can
only claim to have covered the first third of 2006 fully.
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The research methods in the studies that we selected are dominated by case studies,
both single and multiple. This is not surprising, considering our limitation on only
including studies that performed tests in industry. We found one experiment, and it is
not surprising that there are few experiments. Knowledge management is a broad
field, and it is difficult to isolate factors for experiments without making the
experiment irrelevant.
An important question is then: Is it the right mixture of research methods that are
applied to study knowledge management in software engineering? Given the broad
nature of knowledge management, we believe it is right to have a large number of
case studies. But as the field matures, and we would like to see more studies of the
effects of knowledge management, we think we need more in-depth studies in
companies, which call for more studies oriented towards ethnography.
Glass et al. [52] found that empirical studies constitute about 5% of published
research in software engineering as a whole. Comparing our final findings to the
results from our first rough sorting of papers, our final selection constituted about 3%
of the initially selected papers. If we assume that Glass’s data are representative for
the area that we studied within software engineering, we could extrapolate that about
70% of those papers would be conceptual analysis and concept implementation. Most
of the papers discarded were indeed conceptual analysis and concept implementation
without empirical testing, our results do however, not show a discard number on the
empirical criterion as high as 70%. Many studies were also excluded because they
were not relevant to either software engineering or knowledge management.
Therefore it seems that empirical studies constitute a larger part of the studies on
knowledge management in software engineering than in software engineering in
general.
30
POSTPRINT
In this systematic review, we have seen that the knowledge management schools
associated with traditional software development so far has received the most
attention, namely the systems and engineering schools. This is in line with the
observations of Buono and Poulfelt [22], indicating that knowledge management in
software engineering is mainly focusing on first generation knowledge management
in Section 2.1.
We believe the schools that are relevant to agile software development should be
given further attention in the future, as this trend seems to have much influence on
industry practice today. Another issue in deciding on priorities for research is the cost
of implementing activities in the schools. In general, the schools which do not require
codification and a technical infrastructure will be less expensive than the others.
Therefore, we argue that in particular the organizational school should be further
researched as this school is both relevant for agile and traditional software
development, and is inexpensive. Also, the cartographic and spatial schools are good
candidates for further research. As for research methods applied, we think there
should be a larger focus on in-depth studies, shown through a larger use of
ethnographic methods.
31
POSTPRINT
Practitioners following a traditional approach can find some empirical papers and
several lessons learned reports on how to build a knowledge repository. Even though
all papers we identified within the systems school are positive it is important to
remember the objections to following a pure codification strategy we mentioned in
chapter 2.1. We believe there is potential bias in the number of positive reports from
this school versus those who report negative results. Our findings from the
engineering school also support this view, where several papers underline the
importance of not focusing exclusively on codification. An advantage of following the
technocratic approach to knowledge management is that there is more material
available within this “classical” school. A disadvantage is the cost of implementing
strategies relying heavily on codification.
The most important finding from the behavioural schools with implications for
practitioners developing in an agile environment would be that network building is
more likely to be successful if they are built on already existing networks. Also, the
need for diversity in both learning processes and strategies are stressed as important in
order to improve practice. An advantage of the behavioural approach to knowledge
management is the reduced cost compared to implementing the more application
heavy solutions in the technocratic school. However, it has its disadvantage in the
relatively few publications on this theme to learn from.
5.4 Limitations
The main threats to validity in this systematic review are threefold: our selection of
the studies to be included, correct classification of studies according to Earl’s
framework of schools in knowledge management, and potential author bias.
As for the selection of studies, only one researcher read through and discarded the
first results on the basis of the papers’ titles. However, in cases where there was
doubt, the papers were included in the next stage. The second and third selection
stages, which were based on abstracts and full papers, were carried out by both
researchers and we observed a ‘good’ degree of consensus. In cases where there was
disagreement, the issue was discussed until consensus was reached.
32
POSTPRINT
Finally, there is a potential bias in that both authors have written papers that were
included in the review. Where only one author had participated in the primary study,
the other author decided whether or not to include it.
6. Conclusion
This systematic review has addressed the following research questions. 1) What are
the major knowledge management concepts that have been investigated in software
engineering? 2) What are the major findings on knowledge management in software
engineering? 3) What research methods have been used within the area so far?
33
POSTPRINT
• Our search returned field studies, action research, ethnographic studies, and
one laboratory experiment.
The main implication for research is to focus more on the organizational school, while
we believe practitioners should focus also on activities to manage tacit knowledge
when working on knowledge management initiatives.
Acknowledgement
We are grateful to Reidar Conradi at the Department of Computer and Information
Science, Norwegian University of Science and Technology, and Tore Dybå at
SINTEF ICT for comments on an earlier version of this article. We would also like to
thank Chris Wright for proofreading and useful comments. This work was partially
funded by the Research Council of Norway through the project Evidence-Based
Software Engineering (181685/I30).
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Appendix
Table 11: Categorized articles, extended
Systems Cartographi Engineering Economic Organizational Spatial Strategic
c
Emp [11, 20, [34] [2, 6, 15, 17, [53, 84, 91] [5, 49,
24, 35, 27, 32, 51, 116]
72, 111] 54, 86, 101,
108, 118]
LL [4, 12, [4, 38, 48, [60, 61] [30] [21, 40,
23, 29, 64, 65, 83, 46, 63,
57-59, 98, 107, 75, 92,
68, 69, 115] 95, 103,
73, 76, 121]
79, 82,
87, 89,
96, 99,
102,
104,
107]
42