This article provides the answer to the question asked in the title when certain simple conditions apply, and so improves the approximate solutions given by previous writers. The assumptions are: the machine either works perfectly or not at all; there is a constant probability of random failure; the cost of inspection and of restoring the machine to as‐new condition are both fixed: failure can only be detected by inspection.
Baker, M. (1990), "How Often Should a Machine be Inspected?", International Journal of Quality & Reliability Management, Vol. 7 No. 4. https://doi.org/10.1108/02656719010134852Download as .RIS
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