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• W1526451839 abstract "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 ispresented 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.; Þar sem samkeppnin i framleiðsluiðnaði er stoðugt að aukast þa er meiri ahersla logð a laegri framleiðslukostnað. Þvi eru aðferðir sem baeta verkniðurroðun mikilvaegari en aður. Tarkmiðið með þessu verkefni er að baeta verkniðurroðunarfelið hja lyfjafyrirtaeki. Eins og algengt er i lyfjaframleiðslu þa a framleiðslan ser stað i lotum. Þa eru vorur sem tilheyra somu vorufjolskyldu framleiddar saman i lotu i þvi skyni að lagmarka uppsetningartima a framleiðsluvelunum. Gerð er langtima lotuaaetlun sem er byggð a soluspam. Einnig er gerð skammtimaaaetlun byggð a raunverulegum pontunum. I verkefninu er sett fram bestunarmodel sem raðar pontunum niður a framleiðsluvelar. Modelið býr til skammtimaaaetlun sem byggir a langtima lotuaaetluninni. Til að halda uppbyggingunni fra langtimaaaetluninni þa er takmorkun a þvi hversu mikið skammtimaaaetlunin getur vikið fra langtima lotuaaetluninni. Niðurstoðurnar gefa til kynna að haegt er að nota model sem þetta til þess að fa hugmyndir um hvernig haegt se að aðlaga lotuaaetlunina til að koma fleiri pontunum a aaetlun sem og að lagmarka seinkun a afhendingu þeirra pantana sem komast a aaetlun. Að auki gaeti notkun a modelinu dregið ur þeim tima sem þarf að eyða i niðurroðun verka." @default.
• W1526451839 created "2016-06-24" @default.
• W1526451839 creator A5091488310 @default.
• W1526451839 date "2012-06-01" @default.
• W1526451839 modified "2023-09-27" @default.
• W1526451839 title "Production scheduling in a campaign based flexible flow shop" @default.
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