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A Simple Procedure to Determine the Economic Design of an X Control Chart

Summary: A simple procedure for selecting the optimal economic design of an X-bar control chart for a single assignable cause system is presented that can be applied at the workshop level. The procedure has the following features: 1) assuming a constant production rate, the loss per item is chosen as the optimality criterion rather than the loss per hour; 2) inspection of the production process every h hours without preceding sampling inspection is included as an alternative.

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  • Topics: Statistical Process Control (SPC)
  • Keywords: Control charts,Economic design,Process control,X-bar control charts
  • Author: von Collani, Elart
  • Journal: Journal of Quality Technology