Rejoinder to “Virtual age, is it real?”

Maxim Finkelstein, Ji Hwan Cha

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In this rejoinder, we first comment on valuable discussions of contributors. Based on these meaningful inputs, we proceed with description of the notion of “virtual age” from different perspectives. We also add a more detailed description for the new concept of a random virtual age that is applied to degrading items. The latter is used for age recalculation when one operational regime is switched to another.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalApplied Stochastic Models in Business and Industry
Issue number1
StatePublished - 1 Jan 2021

Bibliographical note

Funding Information:
The work of the second author was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (Grant Number: 2019R1A6A1A11051177).

Publisher Copyright:
© 2021 John Wiley & Sons, Ltd.


  • age reduction
  • degradation
  • imperfect repair
  • minimal repair
  • virtual age

Cite this