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Operations Notes – Quality

Quality is a multi-faceted concept. It is not a constraint but an objective that needs to be continuously improved.

Key Quality Contributors

Common and Special Causes of Variation in Quality

Capability is meeting customer specifications – a large % of data points must fall within specification limits

Process capability index (Cp) is given by: Cp = USL – LSL
                                                                         6σ

If Cp = 1 then you have a 3-sigma process; If Cp = 2 you have a six-sigma process (0.002 defects per million)

Total Quality Management (TQM)

TQM Plan, Do, Check, Act (PDCA) Cycle

Step 1 – Analyze Situation
Step 2 – Develop Solution
Step 3 – Develop Action Plan
Step 4 – Implement & Evaluate

Key Take-Aways