Difference between Process capability & Process performance

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Process capability refers to the ability of a process to produce output within specification limits, while process performance refers to the actual output produced by the process.

Process capability is a measure of the inherent variability of a process, while process performance is a measure of the actual output produced by the process.
Process capability is determined by the process design, while process performance is determined by the process execution.
Process capability is expressed as a capability index (such as Cp or Cpk), while process performance is expressed as a process performance index (such as Pp or Ppk).
Process capability is used to assess whether a process is capable of meeting customer requirements, while process performance is used to monitor and improve the process over time.
For example, a process may have high capability (Cpk > 1.33) but poor performance (Ppk < 1.0) due to issues with process execution.

Difference between Process capability & Process performance

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Difference between Process capability & Process performance