A key aspect of MMIC technology development and production is reliability. At Northrop Grumman Space Technology (NGST), reliability assessment and improvement are incorporated into the formative stages of technology development and continue through process qualification and manufacturing. Key components of this approach include: multi-temperature accelerated life testing; other accelerated life...

Accelerated life testing (ALT) is widely conducted to obtain failure-time data in a much shorter time and to make inference about reliability at normal conditions. The accuracy of the reliability prediction is dependent on well-designed ALT plans. A stepstress ALT allows the test condition to change at a given time or upon the occurrence of a specified number of failures. In this paper, we prop...

ABSTRACT: This article presents the development of a general Bayes inference model for accelerated life testing. The failure times at a constant stress level are assumed to belong to a Weibull distribution, but the specification of strict adherence to a parametric time-transformation function is not required. Rather, prior information is used to indirectly define a multivariate prior distributi...

INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Constant Stress Accelerated Life Testing Using Rayleigh Geometric Process Model S. Saxena, Arif-Ul-Islam Department of Statistics & Operations Research, Aligarh Muslim University, Aligarh, India [email protected] Abstract The current study introduces the Rayleigh geometric process model for the analysis of accelerated lif...

9 This article develops a general Bayes inference model for accelerated life testing assuming failure times at each stress level are exponentially distributed. Using the approach, Bayes 11 point estimates as well as probability statements for use-stress life parameters may be inferred from the following testing scenarios: regular life testing, 7xed-stress testing, step-stress testing, 13 pro7le...

Fatigue failures caused by cyclic stresses are commonly modeled by Birnbaum-Saunders (B-S) and Weibull distributions. Sometimes, materials with high cycle fatigue exhibit bimodal failure rates which are difficult to model with Weibull distribution. The objective of this paper is to investigate a general Birnbaum-Saunders (GB-S) distribution which covers diverse hazard rates such as increasing, ...