A Generic Problem-Solving Framework: A 10-Step Sure-Fire Approach
1. Define the Problem (the Green Y)
2. Quantify and measure the Green Y
- - Measurement scatter plot
- - Likert Scale to convert attributes into variables
3. Problem History (problem age, defect rate, cost)
4. Generate Clues:
Multi-vari (including concentration chart)
- - Concentration Diagram
- - Components Search
- - Paired Comparisons
- - Product / Process Search
5. Formal Design of Experiments:
- - Variables Search
- - Full Factorials
- - B vs. C
6. Turn the problem on and off – ensuring permanence of improvement
- - B vs. C
7. Establish realistic specifications and tolerances (optimize)
- - Scatter Plots
- - Response Surface Methodology (RSM)
8. “Freeze” the process improvements
- - Positrol
9. Certify the process: Nail down all peripheral quality issues
- - Process Certification
10. Hold the Gains with SPC
- - Pre-Control
Acknowledgement: World Class Quality book by Keki R Bhote
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