'How To Apply Lean Test Management' by Bob van de Burgt


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Cost reductions and the quest for more efficiency are more evident in today’s business world. It also follows that our testing processes will ultimately be affected. When test techniques and methods for structured testing are introduced, this results in improvements in the production of more consistent and predictable results.

Introducing a risk based approach to testing makes it easier for the business to determine to what extent testing is necessary and most efficient. The resulting Go/No- Go decision process may not be sufficient for all companies so other creative methods need to be investigated. Many management theories speak about “Lean” as being one of the solutions. One of the key steps in using “Lean” is the identification of which steps add value to the customer and which do not. This track will give you information to start using “Lean” within testing and more specifically within test management.

The presenter will also look at Lean Six Sigma as being one of the more popular theories that introduces the concept of “Lean” in combination with obtaining higher quality products. This subject will also be explained in combination with testing and test management. This track will focus on applying Lean Six Sigma techniques to test management processes using practical examples from customer cases. The audience can take home a practical “Lean Test Management” overview which they can apply in their own companies.

This track is especially of interest to business managers, IT managers, QA managers and test managers that are involved in improving the quality of test management processes.

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  • Vilfredo Pareto ( Parijs , 15 juli 1848 – Genève , 19 augustus 1923 ) was een Italiaans econoom. Hij introduceerde het Pareto-optimum voor nutscurves in de micro-economie. Tevens is hij bekend vanwege het Paretoprincipe: hij constateerde dat 20% van de bevolking 80% van het vermogen in Italië bezat. Deze 80-20-regel is later op veel andere zaken toegepast. Dit principe is gebaseerd op de Zipfdistributie. Pareto is een van de grondleggers van de moderne welvaartstheorie. Deze theorie maakt inzichtelijk onder welke voorwaarden een optimale verdeling van productiemiddelen ontstaat en hoe de welvaartsverdeling over de huishoudens plaatsvindt. Van belang hierbij is het zogenoemde pareto-compensatiebeginsel. Dit beginsel betekent het volgende: bij een verandering in de verdeling van de welvaart treden er verliezers en winnaars op; kunnen de verliezers uit de winst van de winnaars worden gecompenseerd dan is de verandering pareto-optimaal. Kortom, een pareto-optimale verandering in verdeling van de welvaart is als alle verliezers voor het verlies uit de winst van de winnaars kunnen worden gecompenseerd.
  • 'How To Apply Lean Test Management' by Bob van de Burgt

    1. 1. How To Apply Lean Test ManagementBob van de BurgtProfessional Testing®Ban Waste,Gain Efficiency1
    2. 2. I will show you differently!2
    3. 3. - Lean Manufacturing- Lean Six Sigma- Roadmap toLean Test Management- ConclusionsAgenda3
    4. 4. What is Lean Manufacturing?• Lean manufacturing is a company process improvementmethod. It is developed from a logistics viewpoint.• Lean manufacturing concentrates on banning waste tobecome quicker and more efficient. Every process thatdoes not add value for the customer is eliminated.4
    5. 5. History Timeline Lean ManufacturingImage source = © 2005 Strategos, inc5
    6. 6. Lean Manufacturing – the 7 wastes• Overproduction• Waiting• Transporting• Inappropriate processing• Unnecessary inventory• Unnecessary / excess motion• Defects6
    7. 7. What is (Lean) Six Sigma• Lean Six Sigma is a quality management method that offers aframework to manage quality. By many it is seen as a sequence ofTotal Quality Management (TQM) with a high use of StatisticalProcess Control (SPC) as underlying method. Processes can becontroled when you know how each process goes and to know thatyou have to measure: to measure is to know! Measuring is the basisof Six Sigma.• The aim is to work smarter and get a higher quality.• Sigma (∂) is the standard deviation from the average. A statisticalterm that measures how far a given process deviates fromperfection.7
    8. 8. History of Six Sigma• Six Sigma is founded at Motorola in the mid 80’s as a solution forproblems with product quality and customer satisfaction. SixSigma got its big popularity when it was used on a broad scale atGeneral Electric and gained billions over a period of multipleyears.8
    9. 9. Defects with sigma level 2-3 σ -2 σ -1 σ 3 σ2 σ1 σ0=targetσσMAX2 σ = 69,1%defectsdefects30,9 % defects9
    10. 10. Defects with sigma level 4-3 σ -2 σ -2 σ 3 σ2 σ2 σ0=targetσσMAXdefectsdefects4 σ = 99,4%0,6 % defects10
    11. 11. 4 key elements• Delight the customer• Improve processes• Teamwork• Data and facts11
    12. 12. • DMAIC:– Define– Measure– Analyze– Improve– Control– Between every step is a tollgateRoadmap to Lean Test Management12
    13. 13. • Purpose:To agree on what theproject is.• Example tools:– SIPOC– Value Stream MapDefine - TheoryDefine13
    14. 14. Define – Example SIPOC* Critical-To-Quality indicators (CTQ)14
    15. 15. Define – Example Value Stream MapETC15
    16. 16. Takt time• Definition Takt Time:The desired time between units of production output,synchronized to customer demand.• The concept carries backward througha process stream. Ideally, every stepsynchronizes with the final output.Takt Time is fundamentalto Lean Manufacturing.16
    17. 17. Takt time – a bomber an hourImage source = © 2005 Strategos, inc17
    18. 18. Measure - Theory• Purpose:Evaluate the existing measurementsystem, observe the process,gather data, and map the processin more depth.• Example tool:– Pareto chart18
    19. 19. Measure – Example Pareto ChartPareto chart for long waiting hours during test executionFailures in test environment 65Failures in test data 20Failures in test cases 8Not fully capable resources 5Rest 210019
    20. 20. • Purpose:Use collected data to confirmthe source of delays, waste,and poor quality.• Example tools:– 5 Why’s– Ishikawa diagramAnalyze - Theory20
    21. 21. Analyze - Example 5 Why’sProblem Statement:During test execution thereare long waiting hours.1. Why are therelong waiting hoursduring testexecution?1. Because oftenthere are failures inthe testenvironment2. Why are therefailures in the testenvironment?2. Because weoften seem to havethe wrong versionof the test object.3. Why do we oftenhave the wrongversion?3. Becausesomeone installedthe wrong version.4. Why doessomeone install thewrong version?4. Because we don’thave proper versioncontrol.5. Why don’t wehave properversion control?5. Because wenever got aroundto it, but it seemstime to do it now. 21
    22. 22. Analyze - Example Ishikawa DiagramLong waiting hours during test execution22
    23. 23. • Purpose:To make changes in a processthat eliminate defects, waste,cost, etc., which are linked tothe customer need identified inthe Define phase.• Example tool:– Pick chartImprove - Theory23
    24. 24. Improve – Example Pick ChartImplement PossibleChallenge KillEasy toimplementHard toimplementLargeresultSmallresult17482369524
    25. 25. Control - Theory• Purpose:To make sure that any gainsa team makes last.• Example tool:– Control chart25
    26. 26. Control – Example Control ChartGain Sigma level30,85% 169,15% 293,32% 399,38% 499,977% 599,99966% 6AverageUpper limitLower limitTriggers foractionsUnpredictableprocesImprovedprocesControlledprocesT3T1 T226
    27. 27. Conclusions• Test Management can benefit from Lean andSix Sigma• Improvement from within your company• Useful addition to “standard” Test ProcessImprovement models• Better integration of test process with otherprocesses27