• Corpus ID: 238634697

Optimal Time Plan in Accelerated Degradation Testing

  title={Optimal Time Plan in Accelerated Degradation Testing},
  author={Helmi Shat and Rainer Schwabe},
Many highly reliable products are designed to function for years without failure. For such systems accelerated degradation testing may provide significance information about the reliability properties of the system. In this paper, we propose the c-optimality criterion for obtaining optimal designs of constant-stress accelerated degradation tests where the degradation path follow a linear mixed effects model. The present work is mainly concerned with developing optimal desings in terms of the… 

Figures and Tables from this paper


Experimental Designs for Accelerated Degradation Tests Based on Linear Mixed Effects Models
Accelerated degradation testing has considerable significance in reliability engineering due to its ability to provide accurate estimation of lifetime charachteristic of highly reliable systems
Optimal Two-Variable Accelerated Degradation Test Plan for Gamma Degradation Processes
To exhibit a monotone increasing pattern, the gamma process is used to model the degradation of a product subject to a constant-stress ADT of two loadings.
Reliability Estimation from Linear Degradation and Failure Time Data With Competing Risks Under a Step-Stress Accelerated Degradation Test
  • F. Haghighi, S. Bae
  • Engineering, Computer Science
    IEEE Transactions on Reliability
  • 2015
A modeling approach to simultaneously analyze linear degradation data and traumatic failures with competing risks in an SSADT experiment is proposed, applied to accelerated degradation data from plastic substrate active matrix light-emitting diodes (AMOLEDs), along with sensitivity analysis.
Methods for planning repeated measures accelerated degradation tests
Repeated measures accelerated degradation tests can sometimes be used to assess product or component reliability when one would expect few or even no failures during a study. Such tests can be used
Reliability demonstration methodology for products with Gamma Process by optimal accelerated degradation testing
An analytical optimal ADT design method is suggested for more efficient reliability demonstration by minimizing the asymptotic variance of decision variable in reliability demonstration under the constraints of sample size, test duration, test cost, and predetermined decision risks.
A literature review on planning and analysis of accelerated testing for reliability assessment
Different types of test planning strategies are categorized, and their drawbacks and the research trends are provided to assist researchers and practitioners in conducting new research in this area.
Optimal designs for random effect models with correlated errors with applications in population phar
A new approach is introduced to determine efficient designs for nonlinear least squares estimation which addresses the problem of correlation between observations corresponding to the same subject, using asymptotic arguments to derive optimal design densities.
The Optimality of Single-group Designs for Certain Mixed Models
In this paper optimal designs for the estimation of the fixed effects (population parameters) in a certain class of mixed models are investigated. Two classes of designs are compared: the class of
A Note on Optimal Bounded Designs
An equivalence theorem is formulated to characterize optimal designs with general prespecified direct constraints on the design intensity. As an application locally optimal designs are obtained with
Optimum Designs for Multi-Factor Models
I General Concepts.- 1 Foundations.- 1.1 The Linear Model.- 1.2 Designed Experiments.- 2 A Review on Optimum Design Theory.- 2.1 Optimality Criteria.- 2.2 Equivalence Theorems.- 3 Reduction