Process Inspection

Process capability analysis can be a crucial component for evaluating the performance of any Lean Manufacturing consultant process. It provides a snapshot of how the output of a process compares to its specifications and does whether the process can consistently meet the required standards. The main purpose of this analysis is to assess whether the process capability index (Cp or Cpk) is sufficient to meet the customer's requirements.

Understanding Process Capability Index
-------------------------------------

The process capability index (Cp or Cpk) measures the spread of a process's output distribution relating to the specifications. A higher Cp or Cpk value suggests that the process is capable of producing output that meets the requirements more frequently. The Cp index shows the ratio of the specification width (USL-LSL) to the process sigma (std deviation), which further multiplies by 3 to obtain the Z-score, and also dividing the result by the specification width.