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I Gede Agus Widyadana
Industrial Engineering, Petra Christian University, Surabaya
Industrial & Manufacturing Engineering

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Perancangan Tata Letak Gudang pada CV. Sarana Graha Lestari Wijaya Wardhana Gunawan; I Gede Agus Widyadana
Jurnal Titra Vol 7, No 2 (2019): Jurnal Titra
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Abstract

CV. Sarana Graha Lestari is a company that distribute aluminium since 1991. CV. Sarana Graha Lestari problem about inventory arrangement in their warehouse therefore, the warehouse condition become messy and difficult for workers to takes materials. CV. Sarana Graha Lestari want to make an effective and efficient warehouse placement that make workers easier to search and takes materials. Two algorithm are introduced to arrange the layout. The first layout algorithm based on Stock Keeping Unit (SKU), the other based on groups of SKU. The result show that layout arrangement based on group of SKU has less moment and easier to search materials.
Analisis Beban Kerja untuk Menghitung Jumlah Kebutuhan Pekerja pada Line Assembly CU Line Condenser di PT. XYZ Evan Edbert; I Gede Agus Widyadana
Jurnal Titra Vol 7, No 2 (2019): Jurnal Titra
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The purpose of this research is to find out the amount of workload so that the company can determine the amount of workers that are needed to complete the customer’s demand on time. The method used is compare workload using work time based on the company’s cycle time formula, calculated standard time, and real time. Calculation of the number workers needed by using work time from the cycle time formula and standard time is then carried out and compared with the actual conditions to find the difference. Worker efficiency calculation are also carried out to see how efficient workers are from October to December 2018. The result shows that workload calculated using cycle time formula is very low compared with using real time, so also when compared to using standard time. Process time from cycle time formula needs to be improved because it does not take into account the number of workers needed to complete the work and there are other problems too. Calculation of worker efficiency shows that the worker’s efficiency is quite low, the highest efficiency is 66.17% from coil assembly position in December. Proposes improvements are how to calculate the number of workers needed and work hours needed, as well as the calculation of non value added time to be given to process time from cycle time formula for processes that are needed but non value added and allowances for workers.
Minimalisir Waste dalam Upaya Pengurangan Waktu Proses Produksi PT X Bobby Setiawan; I Gede Agus Widyadana
Jurnal Titra Vol 7, No 2 (2019): Jurnal Titra
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Abstract

PT X produce heat exchanger where one of their line production is CU Condensor line which produce condensor. Problem faced is, production process takes longer than estimate cycle time. Suspected wastes that cause production process run slower. Therefore, Waste Assesment Model (WAM) is built to know what critical waste is and find that waste defect that need more attention to solve. Further, it is strived to reduce waste defect by using Root Cause Analysis to reduce waste defect. Analysis result show that the biggest defect is painting problem, and 81.3% of them are sagging, peel off, and unpainted part. Three kind of defective are searched for root cause use cause & effect diagram. Each root cause are solved with solution in hope to reduce defect until 36.74%. The reduction of defect percentage can reduce repair time and indirectly reduce the production process time of the condenser unit.
Penentuan Stok Optimal dan Peletakan Bahan Baku Kemas Tube di Gudang PT.X Felita Johanna; I Gede Agus Widyadana; Tanti Octavia
Jurnal Titra Vol 7, No 2 (2019): Jurnal Titra
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PT. X is a manufacturing company that manufactures dermatological products. Inventory of raw materials becomes an important factor in production activities. This research focuses on the inventory and arrangement of  tube materials in the warehouse. The company is currently purchasing goods by estimating demand from past data and ROP. Determination of ROP and EOQ is done by using a simulation method. The results of simulation of raw material inventory show the total cost of proposed inventory and the percentage of shortage is better. The initial total cost of inventory is Rp3,616,786,638 and the proposed condition is Rp1,736,032,454. The inventory simulation results will be used to make for raw material arrangement layout proposal. The arragement proposal for tube materials is done by sorting fast moving products and slow moving products. Fast moving products are arranged with a dedicated storage policy, while for slow moving products are arranged with class based storage policy. The order of placement of each type of tube is based on the highest number of stocks. The arrangement proposal is better than the initial conditions based on warehouse utility and moments. The average warehouse utility increased by 1.82% and there was a reduction in the initial layout moment by 64.55%.
Co-Authors Bobby Setiawan Evan Edbert Felita Johanna Tanti Octavia Wijaya Wardhana Gunawan