Exclusive Content & Downloads from ASQ

Critical Decisions

Summary: The process capability of final product characteristics is measured to ensure compliance to specifications and assess opportunities for improvement. There are situations, however, where the process shows compliance, but as the products move downstream, the magnitude of nonconformance increases, resulting in low yield and out-of-control situations. A strategy based on understanding the relationship between critical-to-process and critical-to-quality characteristics can identify the exact process step where corrective action is needed. A case study illustrates the step-by-step method used by a semiconductor manufacturer to reduce the number of out-of-specification products downstream, reduce internal failure costs, and increase capacity.

Anyone with a subscription, including Site and Enterprise members, can access this article.

Other Ways to Access content:

Join ASQ

Join ASQ as a Full member. Enjoy all the ASQ member benefits including access to many online articles.

Subscribe to Six Sigma Forum Magazine

Access this and ALL OTHER Six Sigma Forum Magazine online articles. You'll also receive the print version by mail.

  • Topics: Six Sigma, Process Capability
  • Keywords: Process improvement, Decision making, Process capability (Cp), Price of nonconformance (PONC), Critical values, Corrective action, Failure analysis, Quality characteristics
  • Author: Ramu, Govind
  • Journal: Six Sigma Forum Magazine