Downloaded from https://www.everyspec.com HIL-HDBK-683(AT) FOREWORD 1. This military handbook is approved for use by all Departments and Agencies of tb De~*nt of DefenOe. 2. Beneficial caments (recommendations, additions, deletions) and any pertinent data which may be of use in improvhg this document should be addrea8ed to: U.S. Army Tank-Autmotive ~, ATTN: AM5TA-GDS, Warren, MI 4B~7-5000, by using the self-addrea~ Standardization I~ement Propmal (DD Form 1426) appearing at the end of by letter. !bcument this docment or 3- ~.
mix between For the bodY of technical knowledge involv-~ statistical process mntrnl (S=), we can-look back to the pioneering work done by ktor Shewhart in the days before World War II (wII). During that war, the War Board taught SE techniques as part of its overall Statistical Quality Control (SQC) program. FollowhgPW/11 , certain large manufacturers in the United States (U.S.) installed SPC; but for a number of reasona it wa8 later discarded as not being appropriate for commercial application. The history of technological advancement has been a brea%hrouglw in both the private sector and the military. b.
The military had adopted MIbSTD-105 for attribute sampling, which aemed very well during YWUI, lmt utilized the basic approach of detection rather than prevention. This resulted in batch rejection of material whenever it wa8 found by inspection to be non-confoming to specification, after the fact. The usual scrap, rework and late deliveries were the natural result. c. With inexpensive energy, great ~ for peace in the world and an unlimited market for American products with little competition, quality waa not at the top of the list of priorities. Price and delivery often ranked higher. d.
However, in the arena of higher volume production where quality wan w~ t, the opportunities for the greatest gains offered by SFC first became wident, namely for: - Zero defects quality - kwer Cost - Timely delivery - Better products ii