Production lot sizing with machine breakdowns
Management Science
A discrete-time Markov production-inventory model with machine breakdowns
Computers and Industrial Engineering
An optimal production run time with imperfect production processes and allowable shortages
Computers and Operations Research
Computational aspects of an extended EMQ model with variable production rate
Computers and Operations Research - Articles presented at the conference on routing and location (CORAL)
On the unutilized capacity of a production-storage system
Operations Research Letters
A multi-stage production-inventory model with learning and forgetting effects, rework and scrap
Computers and Industrial Engineering
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The causes and effects of machine breakdowns have frequently been investigated in the past. One popular stream of research studies technical errors in production and analyzes their impact on the inventory policy of the company. In this paper, we show that random shifts in the production rate of a machine, which may occur, for example, due to technical defects, may lead to a reduction in total cost and therewith to an increase in profit. This obvious paradox may lead to situations where it is economically rational for the company to sustain a technically inefficient situation, or even to take measures to intentionally induce a shift in the production rate, for example by damaging the machine on purpose. In this paper, we illustrate this paradox by referring to an existing inventory model, and trace it back to common assumptions made in the literature.