Problem
Suppose you are the manager of a small retail store. For a specific process, examine the different costs of quality (Prevention cost, Appraisal cost, Internal failure cost & External failure cost) that may be involved. In the context of the tradeoffs among these costs, discuss whether you would want the process to be capable at a 3σ, 4σ, 5σ, or 6σ level. Also discuss what level of capability you would want from the suppliers (or incoming components) of this process.