PLASTIC FILMS PRODUCTION SCHEDULING AT PT. KENCAR SUKSES INVESTAMA USING COLUMN GENERATION METHOD AND JOHNSON'S RULE

• Main Author: FAREN SUTANTO (NIM : 13414107), STEVEN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31101
• Institution: Institut Teknologi Bandung

<p align="justify"> PT. Kencar Sukses Investama (PT. KSI) is a manufacturer of cast polypropylene (CPP) plastic films. According to the daily production report from PT. KSI around 8 weeks in March until April, it is concluded that PT. KSI made 667 jumbo plastic films rolls with trimming waste of 4,07%. That is greater than KPI which has been made by the production director, that trimming waste has to be less than 3,5%, so this KPI is unfulfilled. Then, the changeover of the products from 2017 until April 2018 always greater than 35 changeovers per month, which is also the KPI that has been made by the production director. The causes of both KPI are unfulfilled are the making of orders doesn’t calculate waste accurately and doesn’t consider the deadline from the customers. <br /> <br /> Hence, this study proposes model to get plastic films cutting pattern which minimize waste and procedure to minimize makespan. The model which is used to get the plastic films cutting pattern is based on column generation that minimize the length of the plastic films and the procedure that used is aimed to minimize maksepan between two machines in a flow shop production system. <br /> <br /> The proposed model is tested with historical data from 13 April 2018 and results in 3% of waste, that is reduction of 1,07% and the sum of changeovers is less than 35 each machine per month, 32 times in 8 weeks for Egan 1 and 26 times in 4 weeks for Egan 2. This results conclude that the proposed model has the better solution from the existing condition. <p align="justify">