TPM An Overview
TPM An Overview
TPM An Overview
3 Pillars Description 4 Home Work before implementing TPM. 5 Steps to Implement. 6 Methodology for elimination of Defects.
1 2 Sporadic causes - Why Why analysis Assignable causes - PM analysis.
TPM An Overview
TPM An Overview
Backdrop Sales price generating revenues is market driven and because of competitive nature of market, where the quantum of output per annum in industry outnumbers the total consumption. For sustenance The industry has no other choice left than to :
Reduce the cost of raw material Reduce the rejection to zero Optimize the resource utilization
History Roots can be traced back to 1950 along side PM Concept as a system came to existence in 1971 by Mr. Seichi Nakajima who is presently founder and chairman of JIPM. Concept took shape in Toyota motor Company. Outside Japan in 1980 Mr. Nakajima took first delegation to USA. The idea was presented at 4th International maintenance conference at Cincinnati. 1st Conference took place in Pittsburgh, the same yr. South Asia followed and European federation of National maintenance societies EFNMS adopted.
Expectations Top management commitment. Truthfulness of data. Very slow process. Cultural change. Reversal of view point. Strengthening the weakest link. Increase sustenance and Profitability. Understand and Target ZERO.
Zero Breakdown Zero Wastage Zero Defect Zero Accident
Increasing Productivity.
In terms of output per operator In terms of output per hour Skill improvement for qualitative yield
Increasing Morale.
By inducing sense of ownership By creating safe working condition By knowledge up gradation
Foresightedness
Future developments Cost reduction activities
Performance rate : (Speed Factor) It is the of Operating speed X net operating rate Operating rate = Theoretical cycle time / Actual Cycle Time. = 0.67/0.8 = 83.3% (75/90PPM) net operating rate = Processed amount X actual cycle time / Operation time Continuing with the same example; suppose the actual processing is of 25000 discs then net operating rate = 25000 X 0.4 / 60 / 370 = 45.05 % Therefore P.R. = 83.3 X 0.4505 % = 37.53 %
Quality rate : ( Rejection factor) It is the ratio of Good output / Actual Output Continuing with the same example; suppose the good output (after removing the defectives) is 24750 from the actual output of 25000 discs then the Quality rate = 24750 / 25000 = 99 % OEE of example becomes 86.05 X 0.3753 X 0.99 = 31.97 %
* = Impact of Concious decision that is provided for 50 min. Concept of UP time 370 180 370 150
66600 55500
24750 24750
37.16 Considering a breakdown of 60 min. + (*) 44.59 same as above - Applicable for DVD only
OEE Concept
Equipment Loading Time Down time Operating Time Equipment Failure Set up & Adjustmt Iding & Minor stpg Reduce Speed Defect in Process Reduced yield Performance 6 Big Losses Affecting
Down time
A B C D
Impeding Equipment Efficiency (7) Impeding Machine loading (1) Impeding Human work Efficiency (5) Impeding Effective use of Production (3)
4 Startup loss
Losses from startup after long suspension, holidays, repairs, lunch breaks etc. Target Reduce frequency of adjustment, Monday disease.
6 Speed loss
Primarily because of the low speed (Step down) of equipment. The difference between design speed and actual speed or when the design speed is lower than present technological stds. Target Reduce quality defects arising due to working at designed speed. Designed actual speed should be zero.
10 Motion losses
Motion losses due to violation of motion economy such as losses that occur due to skill differences, and walking losses attributing to inefficient layout. Target Identify the skill gap and reduce and improvise layout
11 Arrangement losses
Waiting time losses involving multi process and multi stand operators and line balance losses in conveyor work. Target Identify the sequence and optimise.
15 Energy loss
Wastage of Electricity, fuel, steam, air and water Target Actual consumption should be equal to std. norms
TPM
Pillars Description
Pillars Description
Pillars Description
Pillars Description
PLANNED MAINTENANCE
PM Establish Preventive maintenance Target Predictive maintenance Satisfy their customers Theoretically MTBF should be zero Analyse all corrective actions taken during running. Think from design improvement angle Reduce operational loads Fool proof the system. Look for weakest link and strengthen the same.
Pillars Description
QUALITY MAINTENANCE
QM To certify Equipment conditions that precludes quality defects and delivers good output only. Conditions are checked and measured in Time series to verify that the measured values are with in stds. Predict the possibility of occurrence of defect rather than controlling defects as a result of inspection Main focus is on 4Ms as source of quality defect. Establishing conditions means setting the range of material, Eq, method or operating conditions that must be maintained to produce a flawless product. Always target the root cause of problem / defect.
Pillars Description
Pillars Description
DEVELOPMENT MANAGEMENT
DM Shorten trial period for new product Shorten development, design and manufacturing period for new equipment Anticipate user need and first to launch and skim profits Ensure that the time to launch new product should be minimum to have vertical startup. Life cycle curve should be judiciously monitored Optimise life cycle cost. Work on Maintenance Prevention Investigate weakness of current equipment and improve the designs.
Pillars Description
OFFICE TPM
OT Identify the administrative hidden cost Zero loss of opportunity for production Planning, Development, Administration does not contribute directly as Production does. Their prime role is to process information and response mechanism for changes taking place in social and business environmt. Win Customer confidence. What issues we should address to maximise our own efficiency? Retrieval of documents in stipulated time.
Pillars Description
Getting started
Write what you speak (develop habit to write correct and precise English) so that an outsider reads and understand.
Distinguish Temp. problem and High / low Temp.
Implement 1 S & 2 S Motivate Sell motive & improve communication Listen more and speak less Understand Problem concept Understand Bath Tub curve
Getting started Understand CLIT Implement Step 0, 1 and 2 of JH before Kick off Liberate workers You have bought their hands win their heart, You have bought their heads win their brain Speak with true Data Identify Projects related to dirt, mishandling and wrong handling. The defects what can be reduced to zero should be made zero Implement Kaizen concept
Getting started
Start up Failures
Design / Manufacturin g errors Trial run at acceptable and start up control
Chance Failure
Operational errors
Cause
Counter measure
Proper operation
Maintenance Prevention
Steps to Implement Step 1 - Decision to introduce TPM Step 2 - Launch Educational Programme Step 3 Create organisation to promote TPM Step 4 Establish Basic TPM policies & goals Step 5 Formulate a master plan for TPM Dev. Step 6 Hold TPM Kick off Step 7 Improve OEE Step 8 Establish JH for operators Step 9 Setup maintenance programme For maint. Deptt. Step 10 Conduct training to improve mait & operator skill Step 11 Develop early equipment Management progm. Step 12 Implement TPM fully and aim for higher goals
The case of Preventive action proposed : non - replace ment of spare parts GUIDELINES The observation : Symptoms / failure / Breakdown Why 1? Why 2? Why 3? Why 4? Why 5? Root Cause is becauser of one of the following items 1 2 3 4 5 JH JH PM PM E&T Poor basic condition Poor operating condition Deterioration Weak Design Poor skills
Remarks
Signatures :
Engineer
Section Manager
Kaizen No.
Establish Conditions
Identify the Chronic problem Identify Physical View Contributing conditions and Primary 4 M conditions.
PHYSICAL PHENOMENON PHENOMENON PHYSICAL VIEW High thickness of ink High quantity of ink deposition CONTRIBUTING CONDITIONS Pressure PRIMARY 4M CONDITION Pressure Level of squeegee Mesh size of screen Stroke lenth of cylinder
Viscosity Screen Spreader More distance between Screen and disc on table
CONDITIONS S. No. PRIMARY 4M CONDITION 1 Pressure Level of squeegee SECONDARY 4M CONDITIONS Is pressure checked, conforms the standards Is the calibration validated Contribution of Squeegee' surface Contribution of Squeegee' material Conformance of pressures it can sustain and subjected
Identify Check point and check item Identify Measurement method Record survey findings and measure against standards Evaluate and find OK or NG
Measurement Method Visual Visual Radius guage Comparison Comparison Visual Evaluation Standard Measured (OK / NG) 2.5Kg to 3 Kg 2.7 Kg OK Valid up to 1st July 04 Date overshot / not OK upto Radius 1.5mm allowed reading OK?NG Composition (X,Y,Z) (x,y,z) 100000 strokes 80000 OK Not existing Found under microscope NG Survey findings
PM RESULTS (SURVEY RESULTS OF SECONDARY 4M CONDITIONS) CHECK SITE (Pos. Check Item Mechanism) 1 Squeegee Holder Pressure guage Calibration of guage Surface Squeegee Material Squeegee Life Squeegee Screen Squeegee dust
Y1>Y
Squeegee worn out X Y1
Y1>Y is nonconformance
Restoration Plan
Identify Check Site Remark the action taken or imp information Identify Restoration plan, its status and results
RESTORATION PLAN S. No. Check Site 1 Squeegee 2 Screen Abnormality Surface worn out Squeegee dust Remarks Life not completed Restoration Planned Status Results Replce after a definate Complete OK interval Conduct trials every Inprocess awaited 10K strokes & check under microscope
Kaizens
Only a sheet having photographs of Before / After Sketches can also do if Photos are hard to describe.
KAIZEN - POWER
Theme Should address either of 16 losses Present Status / Problem Depict either Present status or Problem (Before) Analysis Proper Why Why analysis as per sheet to identify the root cause (sheet attached) Idea Should be opposite to root cause Counter measure Implementation of idea, written in past tense (After) Results In graphical form, Should corroborate with theme. Benefits Preferably in monitory terms or morale (Should include the total benefit after horizontal deployment). The benefits should reflect in companys financial statements.
KAIZEN - POWER
Horizontal Deployment Duplication of the same Kaizen at similar applications / machine. The Kaizens should be deployed at the site of application All types of Kaizens should be encouraged. The idea should be original and conceived first time. All activities relating to cost reduction / facilitation / Time reduction are Kaizens. No. of Kaizens offered are the barometer to sense the Morale of employees.
KAIZEN - POWER
Root Cause
Burr Tool Life Short Easy to Loose Less Friction Difficult to Inspect Poka Expensive No Burr Long Life Difficult More Easy Poka Yoke Cheap
kaizen Idea
Cover
Kaizen
Coating Material Change Double nuts Change Design Change location Inside Outside
Sensor Steel Plastic; Import Domestic; Alternate vendor Sueo Yamaguchi, Advisor TPM Club, India
KAIZEN - POWER
Moser Baer India Ltd
KAIZEN IDEA
Activity Loss -SHEETNo./Step KK JH QM PM SHE OTPM DM ET Result Area Plant : Packaging dept. Machine : TAM B/W ,WE-12 Kaizen theme : To eliminate the customer complaints regarding the non Idea : Detect availability of disc in Jewel case. Problem/Present status : The Disc is packed in Jewel case on automatic packing machine having 120ppm packing speed Operator manually transfer the discs from spindle to machine cartiage. The stacked discs move on spindles having blank substrate at top and bottom. The blank substrate is provided to safeguard the discs from any abraison / damage by chance. Sometimes the customer receives a blank substrate instead of disc Analysis : Why customer receives a blank substrare instead of Disc ? Because the machine packs it. Why the machine packs it ? Because it presents itself for packing. Is it possible to stop BS reaching packing point? Not always, there is a possibility that by mistake BS may reach the machine as the operator transfer the disc manually. Can we detect the presence of BS and prevent it from packing? Yes Results : Benefits :
1> Customer complaints of NC of packed cases without disc eliminated 100 %. 2> Machine productivity gets improved. 3> Less Re-work options.
S Date :
Countermeasure A capacitive sensor is provided in line, it senses the metallic layer which is always present in disc. Since Blank Substrare is a plastic mass; the input from sensor is processed in PLC which subsequently remove the Jewel case from line.
1> The 50000 ppm Bench mark cases without disc/blank disc used to get pac
50000 PPM
Benefits Profits goes up as losses are removed. Actual inefficiencies of organisation are known. Brings assertiveness amongst operator as their knowledge level goes up. Cultural change. Cost competitive. High Morale. People are not removed but redeployed. Responsibility towards society.
Drawbacks Long drawn process. Lot of patience is required. Calls for increase in inventory of Spares. Paper work increases. Calls for Absolute Zero. Initial Benefits are easily seen but when approaching Zero, the cost involved goes high making it unviable. Activity fails unless the Top management is non committed and expect from middle management.