• Assessing some aspects of factor screening with nonnormal responses 

      Chaudhry, Muhammad Azam; Tyssedal, John Sølve (Journal article; Peer reviewed, 2019)
      Nonnormally distributed response values, such as count data for instance, create challenges for factor screening. One problem is that variances may vary from run to run. Another is the choice of screening design for such ...
    • Discussion of "Virtual age, is it real?" 

      Lindqvist, Bo Henry (Peer reviewed; Journal article, 2020)
      I congratulate the authors on this very interesting article discussing various aspects of the virtual age concept, which has been in active use in reliability and lifetime analyses for at least three decades. At the same ...
    • New tests for trend in time censored recurrent event data 

      Lindqvist, Bo Henry; Kvaløy, Jan Terje (Journal article; Peer reviewed, 2024)
      We consider testing for trend in recurrent event data. More precisely, for such data we consider testing of the null hypothesis of data coming from a renewal process. The new tests are essentially obtained by considering ...
    • Phase-type models involving restarting and instantaneous transitions, with applications to degradation and maintenance 

      Lindqvist, Bo Henry (Peer reviewed; Journal article, 2023)
      A phase-type distribution is the distribution of time to absorption for an absorbing continuous-time finite state Markov chain. The paper first reviews the extension of the phase-type setting to modeling of competing risks ...
    • The Choice of screening design 

      Tyssedal, John Sølve; Chaudhry, Muhammad Azam (Journal article; Peer reviewed, 2017)
      A screening design is an experimental plan used for identifying the expectedly few active factors from potentially many. In this paper, we compare the performances of 3 experimental plans, a Plackett-Burman design, a minimum ...