A major concern during the beginning of the coronavirus disease 2019 (COVID-19) pandemic was the possibility that SARS-CoV-2, the pathogen responsible for the disease, might spread through surfaces.

The problem of how to extend the time interval of fixed time period maintenance for items whose failure can be catastrophic, is considered in this paper. The paper proposes a coherent methodology ...

If you specify the option METHOD=SEQ and do not include a SIZE statement, PROC SURVEYSELECT uses the equal probability version of Chromy's method for sequential random sampling. This method selects ...