Title: Multiple-steps step-stress accelerated life tests: a model and its spreadsheet analysis
Authors: Loon-Ching Tang
Addresses: Department of Industrial and Systems Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
Abstract: We present a simple and yet powerful method for analysing data from multiple-censored, multiple-steps step-stress accelerated life tests. The method is a simplification of Tang et al. (1996) and its extension to handle interval data and other forms of censoring. To further simplify the procedure of analysing step-stress data, which has been made unduly complex in the existing literature, we implement the proposed method using spreadsheet programming on Excel. The corresponding templates for different types of data are presented along with examples taken from the literature.
Keywords: accelerated life testing; cumulative exposure; data analysis; maximum likelihood estimation; Weibull analysis; step-stress testing.
DOI: 10.1504/IJMPT.2004.004999
International Journal of Materials and Product Technology, 2004 Vol.21 No.5, pp.423 - 434
Published online: 11 Aug 2004 *
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