Journal
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
Volume 57, Issue 1, Pages 61-82Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207543.2018.1459923
Keywords
manufacturing and maintenance; integrated scheduling; capital goods; mixed integer linear programming
Categories
Funding
- Thailand Research Fund [PHD/0135/2552]
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The scheduling literature is extensive, but much of this work is theoretical and does not capture the complexity of real world systems. Capital goods companies produce products with deep and complex product structures, each of which requires the coordination of jobbing, batch, flow and assembly processes. Many components require numerous operations on multiple machines. Integrated scheduling problems simultaneously consider two or more simultaneous decisions. Previous production scheduling research in the capital goods industry has neglected maintenance scheduling and used metaheuristics with stochastic search that cannot guarantee an optimal solution. This paper presents a novel mixed integer linear programming model for simultaneously solving the integrated production and preventive maintenance scheduling problem in the capital goods industry, which was tested using data from a collaborating company. The objective was to minimise total costs including: tardiness and earliness penalty costs; component and assembly holding costs; preventive maintenance costs; and set-up, production, transfer and production idle time costs. Thus, the objective function and problem formulation were more extensive than previous research. The tool was successfully tested using data obtained from a collaborating company. It was found that the company's total cost could be reduced by up to 63.5%.
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