Production scheduling in a campaign based flexible flow shop

In today’s manufacturing environment, where the competition is constantly increasing, there is increased pressure to reduce the production cost and therefore good scheduling approaches become more important. The aim of this research is to improve the production scheduling process at a pharmaceutical company. The manufacturing plant operates in a campaign mode. Products that belong to the same product family are produced consecutively by the same machine in order to minimize the set-up and cleaning times. Long-term campaign plan is created based on a sale forecast. Short-term schedule is also created based on real orders. In this study an optimization model is presented that arranges the orders in the campaign plan. To keep the structure of the long-term campaign plan, there is a limitation on how much the short-term schedule can deviate from the long-term campaign plan. The results indicate that the model proposed in this study could be used as a decision making tool when scheduling orders into a preplanned campaign plan. The model could give the schedulers an idea of how they might change the preplanned campaign plan in order to schedule more orders and/or to minimize the delay, and to evaluate whether the change is worth it or not. Moreover it can reduce the valuable time the schedulers spend in scheduling.

Author dc:creator

• Rannveig Guðmundsdóttir 1986-

Contributors dc:contributor

• Háskólinn í Reykjavík

• Rekstrarverkfræði
• Framleiðsluhagfræði
• Bestun
• Tækni- og verkfræðideild
• Meistaraprófsritgerðir
• Engineering management
• Industrial productivity

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/1946/12766

OAI identifier oai:identifier

oai:skemman.is:1946/12766