An unstable process is unpredictable. If a process is not stable, you can’t predict future performance and improve process capability or efficiency. Thus, a process must be stable before it can be determined capable and capable before improving efficiency.
Process capability is the ability of a process to produce products and provide services that consistently meet engineering tolerances and customer requirements. It’s important to note that a process must be stable before it can be determined capable. If a process is found to be unstable, the team must first identify reasons for its instability and engage in problem-solving to eliminate the offending causes.
Capability is assessed by comparing ...
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