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IPC 9261A

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IPC 9261A In-Process DPMO and Estimated Yield for PCAs

standard by Association Connecting Electronics Industries, 10/01/2006

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Now updated to align with IPC-7912A for end item DPMO, this document defines consistent methodologies for computation of in-process defects per million opportunities (DPMO) metrics for any evaluation stage in the assembly process. It is intended for use in measuring in-process assembly steps rather than end product determination. Calculation of completed item DPMO is addressed in IPC-7912A. A guide to defect categorization is provided that can serve as a base for summarizing and reporting in-process defects when used with J-STD-001 and IPC-A-610. It can also be used to develop process step estimated yield - the expected percentage of assemblies with no defects for a particular process step or combined process steps, based on historical defect rates. 12 pages. Released October 2006.

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Published: 10/01/2006 ANSI: ANSI Approved Number of Pages: 24File Size: 1 file , 220 KB