EXPLOITING DETERMINISTIC MAINTENANCE OPPORTUNITY WINDOWS CREATED BY CONSERVATIVE ENGINEERING DESIGN RULES THAT RESULT IN FREE TIME LOCKED INTO LARGE HIGH-SPEED COUPLED PRODUCTION LINES WITH FINITE BUFFERS

Casper Durandt, Eon Van der Merwe Smit, Niek D Du Preez

Abstract


Conservative engineering design rules for large serial coupled production processes result in machines having locked-in free time (also called ‘critical downtime’ or ‘maintenance opportunity windows’), which cause idle time if not used. Operators are not able to assess a large production process holistically, and so may not be aware that they form the current bottleneck – or that they have free time available due to interruptions elsewhere. A real-time method is developed to accurately calculate and display free time in location and magnitude, and efficiency improvements are demonstrated in large-scale production runs. 


Keywords


Coupled production; V-profile; free time; critical downtime; maintenance opportunity window

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DOI: https://doi.org/10.7166/27-2-1370

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Copyright (c) 2016 Casper Durandt, Eon Van der Merwe Smit, Niek D Du Preez


ISSN 2224-7890 (on-line) ; ISSN 1012-277X (print)


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