Unit testing is testing of individual units or groups of related units. What are a company's typical strengths and weaknesses when applying unit testing? Per Beremark and the author surveyed unit testing practices on the basis of focus group discussions in software process improvement network (SPIN) and launched a questionnaire to validate the results. This survey is an indication of unit testing in several companies. You can use the questionnaire at your own company to clarify what you mean by unit testing, to identify the strengths and weaknesses of your unit testing practices, and to compare with other organizations to improve those practices