The standard provides a strategic framework to help manufacturers move from "final inspection" (detecting defects) to "process control" (preventing defects). It focuses on reducing variation in processes such as PCB fabrication, assembly, and testing. Key Elements of IPC-9191 SPC Philosophy:
IPC 9191 is a standard published by the Institute for Printed Circuits (IPC), now known as IPC - Association Connecting Electronics Industries. The standard is titled "Guideline for In-Process Visual Inspection and Visual Acceptance Criteria for Printed Circuit Boards". ipc9191 pdf