Optimering av processeringsordning vid enstycksflöde : En studie i produktionssimulering på Rototilt
Sammanfattning: Rototilt is one of the leading companies in the tiltrotator market. Rototilt is based in Vindeln, where the tiltrotators are both developed and manufactured. Rototilt has recently expanded and therefore doubled the size of their production facilities. Among other things this has led to the painting process moving towards a single piece flow of tiltrotators. Rototilt wants to investigate if there's a better order of processing the components of a tiltrotator during the painting process. The goal of this work has been to investigate if a better processing order exists, which led to this thesis work being divided into three parts. To start off, a time study was done to gather process information. Following that simulation software was developed and simulations were made. The final part was analysing the results. The time study had to include several simplifications, mainly due to the large amount of different configuration options Rototilt offers. Due to this, there wasn't enough time to gather enough data. This led to the aim of this thesis work shifting from producing an optimal processing order to developing tools capable of investigating which order is optimal when there is enough data available. The tools developed were a database as well as custom simulation software developed for this project used alongside a model created in ExtendSim. Using the data gathered, the simulations resulted in one processing order showing lower cycle times than the others. Processing the components taking the least amount of processing time first and then the second least and so on resulted in the lowest cycle times. Simulations also showed that current production equipment is capable of higher capacity due to being capable of handling a lower takt time. Due to the large amount of simplifications, it is not recommended to follow the simulation results blindly. The results show that there most likely is an optimal processing order. It also showed that if there is a higher demand and production capacity needs to be increased, investing in new equipment might not be necessary if the utilization of equipment is high enough and downtime is minimized.
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