More on Failure-Rate Prediction and Wearout Detection,

Abstract : The report is intended as the summary of approximately two years of study carried on in conjunction with the Naval Air Systems Command under the auspices of the Office of Naval Research through the George Washington University's Program in Logistics. The emphasis throughout this work has been the development of procedures for detecting: (1) when devices have been burned-in; and (2) when they first begin to show signs of ageing. The paper is divided into three specific technical sections. The first presents the main technique that is used for detection. The second section discusses the determination of an optimal replacement policy. The final technical presentation illustrates the use of the F technique on the failure and removal of 13 specific Naval air devices, and includes copies of the data and computer output for each case. (Modified author abstract)