1. Background Coating process uses fixtures (cans) to mask part leaving the area to be coated exposed to the coating material. Coating thickness is assessed by having a positive correlation to the weight of the part before and after coat (weight gain). Along with process variation, measurement variation, tooling variation is also a significant variation that is considered as a source of variation.

2. Background Process is reaching its maturity and tool wear is affecting the quality of parts. Can are stripped of excess coating after five or ten run by an acid strip process and are blasted with grit to ensure favorable surface finish.

3. Data Collection The following data is collected –Can runs –Times the cans have been stripped –WG variation in Cans –Coating Times per can per run

4. Mean WG vs CAN ID

5. Deliverables Identify BOB (best of the best) and WOW (worst of the worst) cans within the subset. Estimate life characteristics of the failed cans (distributions). Reliability, Probability to failure, Mean Life, Failure Rate will be calculated. Propose a preliminary age replacement plan with cost dollars associated with it. –Appropriate time for repair (weld repair, replace cans after this many uses etc)