OTL web interface: Outlier testing in lifetime data

Chien-Tai LIN, Yu-Nan WU, N. BALAKRISHNAN, Man Ho Alpha LING

Research output: Contribution to journalArticlespeer-review


A web interface, named OTL, is developed to perform outlier analysis in exponential, Weibull, lognormal, and log-Laplace samples online over the Internet through Shiny and R. It is a tool to evaluate the exact or approximate distributions of block and consecutive test statistics for testing the presence of outliers that have been discussed over the years in the literature. As it allows for identifying outliers without using the classical extensive tables, OTL can be very useful to academics, policy-makers and executives to compare and understand the results of outlier testing procedures more efficiently in the case of lifetime data. Copyright © 2022 Informa UK Limited.
Original languageEnglish
JournalCommunications in Statistics - Simulation and Computation
Early online date05 Sept 2022
Publication statusE-pub ahead of print - 05 Sept 2022


Lin, C.-T., Wu, Y.-N., Balakrishnan, N., & Ling, M. H. (2022). OTL web interface: Outlier testing in lifetime data. Communications in Statistics - Simulation and Computation. Advance online publication. doi: 10.1080/03610918.2022.2116748


  • Critical value
  • Discordancy test
  • Spacings
  • User interface


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