1. Six Sigma & Test Process Improvement
Nederlandse Testdag
November 29th 2007
Alessandro Di Bucchianico & Ed Brandt

2. Content Process improvement Basics of Six Sigma
Six Sigma and CMM, GQM, etc.
Discussion:
“Six Sigma and the Improvement of Test Processes”
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3. (Product/market grid by Ansoff)
Process Improvement
Product
development
Diversification
product
Market
penetration
Market
development
market
(Product/market grid by Ansoff)
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4. Basics Six Sigma
Michael Harry
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5. Basics Six Sigma
“Show me the money!”
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6. Six Sigma drive for defect reduction
Based on the "statistical thinking" paradigm:
Everything is a process
All processes have inherent variability
Data is used to understand the variability and drive process improvement decisions
Bijvoorbeeld in ziekenhuizen (Rode Kruis Beverwijk); anekdote ‘mensen voor de heup operatie al met krukken leren lopen’
Allang niet meer alleen in manufacturing processes
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7. Six Sigma model Closed loop principe zit bijvoorbeeld niet in GQM
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8. Other models
CMM
6 
GQM
PSP
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9. Six Sigma and TPI®
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10. Can TPI benefit from Six Sigma?
What are the products of a test process?
How should we measure defects?
Which specification limits do we recognize?
How do we start?
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11. Products of a test process?
Defects log
Adequately functioning system
Test cases
Test report
Test metrics
Improvement suggestions for the system
Test plan
Entries made on the fly during the presentation based on discussion and comments from the audience.
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12. How to measure defects? Defects in defects logging Traceability
Test cases
Entries made on the fly during the presentation based on discussion and comments from the audience.
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13. Specification limits? Time To Repair Test costs …
Entries made on the fly during the presentation based on discussion and comments from the audience.
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14. Some sample metrics 1 Number of test defects per FP
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15. Some sample metrics 2
Test failure intensity
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16. How do we start?
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