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All Journal Journal The Winners Binus Business Review Jurnal Manajemen Indonesia ComTech: Computer, Mathematics and Engineering Applications Business Economic, Communication, and Social Sciences Journal (BECOSS)
Shelvy Kurniawan
Bina Nusantara University
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Mathematics Social Sciences

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Journal : ComTech: Computer, Mathematics and Engineering Applications

 1 
Optimizing Production Process through Production Planning and Inventory Management in Motorcycle Chains Manufacturer Shelvy Kurniawan; Steven Sanjaya Raphaeli
ComTech: Computer, Mathematics and Engineering Applications Vol. 9 No. 2 (2018): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v9i2.4723

Abstract

Based on the data, there were still shortages of production from year to year and demand wereunstable in motorcycle chains manufacturer in Indonesia. To overcome these problems, the purpose of this research was to make production planning and inventory control consisting of forecasting, aggregate planning, Master Production Schedule (MPS), and Material RequirementsPlanning (MRP). Forecasting used the additive decomposition method (average of all data), multiplicative decomposition (centered on moving average), and winter method (additive and multiplicative). Aggregate planning used chase strategy, level strategy, and transportation model. Moreover, MRP used lot for lot, Economic Order Quantity (EOQ), and Periodic Order Quantity (POQ) methods. The test shows several results. First, the best forecasting is additive decomposition (average of all data) with MAD value of 3.033,57, MSE with 13.590.490,and MAPE with 10,083%. Second, the best aggregate planning is transportation model with the total cost of Rp7.708.398.390,00. Last, the best MRP method is the lot for lot with total cost Rp7.162.567.653,00.
The Measurement and Improvement of Effectiveness in K-440 Haul Truck Using Overall Equipment Effectiveness in Coal Mining Company Shelvy Kurniawan; Ayesha Azaria; Talitha Alzena; Yandri Habib Dwicahyo
ComTech: Computer, Mathematics and Engineering Applications Vol. 10 No. 2 (2019): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v10i2.5692

Abstract

The objectives of this study were to determine the effectiveness of K-440 haul trucks based on Overall Equipment Effectiveness (OEE) calculation, to find out the main factors that caused the ineffectiveness of K-440 haul trucks based on fishbone diagram and Failure Mode and Effect Analysis (FMEA), and to analyze the proposed implementation of appropriate improvements to overcome the main problems of K-440 haul trucks. The method used was the mixed method, and the type of research was descriptive. The analysis methods used were OEE, fishbone diagram, and FMEA. The results show that the average effectiveness of the three K-440haul trucks is still far below international standards, which is 44,99%. The material is a significant factor that causes low OEE based on fishbone diagram analysis. There are five problems based on the Risk Priority Number (RPN) critical value from FMEA analysis, namely transmission which is not functioning properly, worn brake lining, unrotated propeller shaft on the shaft, cracked brake drum, and broken spring. Then, the implementation of eight pillars of Total Productive Maintenance (TPM) is proposed in overcoming the main problem of K-440haul trucks. Based on these results, the company needs to implement eight pillars of TPM and carry out OEE calculations regularly.
Co-Authors Alodia Tankoma Ayesha Azaria Denny Marzuky Farras Ammar Bamumin Hamali, Sambudi Kevin Novaldi Kusnandar Rio Ryanto Sandra Gunawan Siska Marisah Stevanni Cyintia Dewi Steven Sanjaya Raphaeli Talitha Alzena Vanny Agustine Yandri Habib Dwicahyo