English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the literature, the study of preventive maintenance policies has been largely focused on ergodic analysis where the expected economic performance measure per unit time would be optimized in a long run. When the planning horizon τ is not large, however, the optimal preventive maintenance policy in (0 ,τ ) could be significantly different from that under ergodicity. In this paper, the classical semi-Markov model of Makabe (6) is first examined thoroughly at ergodicity, yielding many new results. Then, through the dynamic analysis of the semi-Markov model, the asymptotic expansion of the expected reward in (0 ,τ )i s obtained explicitly in an affine form. The optimal preventive maintenance policies in (0 ,τ ) are then compared with the ergodic counterparts, thereby demonstrating danger of exclusive reliance on ergodic analysis when τ is not sufficiently large.

DANGER OF EXCLUSIVE RELIANCE ON ERGODIC ANALYSIS FOR A CLASS OF PREVENTIVE MAINTENANCE POLICIES