Certificate of Conformance vs. Certificate of Analysis
Material Certification Types
APP uses the following terminology to address certification of materials.
Certificate of Conformance (C of C):
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CRITICAL CHARACTERISTICS AND KEY PRODUCT CHARACTERISTICS (KC)
By
EngineeringTeam
| 3:12 PM CDT, Wed October 28, 2026
The following article is reprinted with permission from the author from The American Society of Quality,(link is external)(link is external) , The Aviation/Space and Defense Division newsletter FALL 2003_Volume 35 Number 2. All rights reserved.
CRITICAL CHARACTERISTICS AND KEY PRODUCT CHARACTERISTICS (KC)
By Gene Barker, CQE, Certified Quality Manager, Boeing Technical Fellow, The Boeing Company