Optimum buffer stock during preventive maintenance in an imperfect production system

The paper investigates a production‐inventory model where regular preventive maintenance starts at the end of production for smooth functioning in the next cycle. During production run time, the manufacturing system may shift from “in‐control” state to “out‐of‐control” state after a certain time. Th...

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Bibliographic Details
Published inMathematical methods in the applied sciences Vol. 45; no. 15; pp. 8928 - 8939
Main Author Sana, Shib Sankar
Format Journal Article
LanguageEnglish
Published Freiburg Wiley Subscription Services, Inc 01.10.2022
Subjects
buffer inventory
Buffers
Cost analysis
Manufacturing
Mathematical models
Optimization
Parameter sensitivity
Preventive maintenance
production run time
Sensitivity analysis
shortages
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Summary:The paper investigates a production‐inventory model where regular preventive maintenance starts at the end of production for smooth functioning in the next cycle. During production run time, the manufacturing system may shift from “in‐control” state to “out‐of‐control” state after a certain time. The manufacturing system produces imperfect quality products during “in‐control” state and “out‐of‐control” state with different rates, and these imperfect quality products are reworked at costs in parallel system. The whole items are sold with free minimal repair warranty if any fault arises after sale. This study extends and corrects the Sana's production‐inventory model and derives optimal buffer inventory to minimize the expected costs per unit item. A numerical illustration with its sensitivity analysis of the key parameters is studied to justify the proposed model.
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content type line 14
ISSN:0170-4214
1099-1476
DOI:10.1002/mma.8246