Page 453 - Design for Six Sigma a Roadmap for Product Development

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with or without warning and trend signals applied to control the PVs
or monitor the DPs, standard operating procedures (SOPs) for detection
purposes, and short-term inspection actions. In applying these meth-
ods, the DFSS team should revisit operator training to ensure proper
control functions and to extract historical long-term and short-term
information.
Control plans are the living documents in the manufacturing,
assembly, or production environment, which are used to document all
process control methods as suggested by the FMEA or yielded by other
DFSS algorithm steps such as optimization and robust design studies.
The control plan is a written description of the systems for controlling
parts and processes (or services). The control plan should be updated
to reflect changes of controls on the basis of experience gained over
time. A form is suggested in Fig. 11.8.