Using Pareto analysis, fishbone diagrams, and histograms to identify and eliminate the root causes of defects. 3. Process Characterization
Table based on information from IPC-9191 standards outlines.
A companion guide that provides specific "how-to" interpretations for Printed Board Assembly (PBA) operations.
IPC typically reviews standards every 5–7 years. As of mid-2026, the latest revision is still widely used (check the document number on ipc.org for the exact revision letter, e.g., IPC-9191A or B). ipc9191 pdf
It helps harmonize SPC strategies across different teams within an organization.
: Management commitment, financial tracking of quality costs (prevention vs. appraisal), and cross-functional training.
DFM focuses on the bare fabrication of the circuit board. The guidelines help designers avoid layout choices that lead to high scrap rates or complex manufacturing workarounds. Using Pareto analysis, fishbone diagrams, and histograms to
The provides the blueprint for setting up a Statistical Process Control (SPC) system. It is harmonized with the international standard ISO 11462-1 , combining worldwide quality elements with specific rules for the electronics industry.
An effective SPC system cannot survive as an isolated quality department initiative. IPC-9191 emphasizes that successful implementation requires active leadership commitment, cross-functional training, and a culture that values data-driven decision-making. 2. Process Mapping and Parameter Selection
is the premier global standard providing General Guidelines for Implementation of Statistical Process Control (SPC) within the electronics manufacturing industry. Originally published in November 1999 to supersede IPC-PC-90, this 52-page foundational document establishes a unified philosophy for monitoring, reducing, and eliminating process variation. By replacing reactive "find-and-fix" final inspections with predictive, data-driven process controls, companies can systematically lower manufacturing costs, boost production efficiency, and ensure stable yields. It helps harmonize SPC strategies across different teams
IPC-9191 serves as the foundational standard for implementing Statistical Process Control (SPC) in electronics manufacturing, focusing on proactive process management to reduce variation. It provides a framework for utilizing tools like control charts and capability indices (
By catching process drifts early, factories significantly reduce scrap rates, rework hours, and material waste.