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

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Penerapan Strategi Optiflow pada Plant Sensor PT X Charles Ongko Wijoyo; I Gede Agus Widyadana
Jurnal Titra Vol 8, No 1 (2020): Volume 8 No 1
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PT X has three production plant, which one of them is Sensor plant. This thesis is made for renew the material grouping in procurement strategy in Sensor plant of PT X. This renewal purposed to make an adjustment to current condition. Optiflow strategy is one of PT X’s procurement strategy category that used to decrease the value of the inventory. Optiflow strategy that used in PT X are consignment, VMI, and the combination from both. The largest inventory value come from the material which use non-optiflow strategy in current condition. Implementation of this new design will focus on current non-optiflow material category. Estimated impact from the renewal is the decrease of inventory value till 45,5%.
Optimasi Rute Pengiriman pada CV. X Menggunakan Metode Evolutionary Algorithm Setiadi Setiadi Yulianto; I Gede Agus Widyadana; Nova Nova Sepadyati
Jurnal Titra Vol 10, No 1 (2022): Jurnal Titra Januari 2022
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CV. X is an ice cube distributor. The company faced a problem that ice cube distribution time ussually longer than time window that has been set by the company. This research is focused on minimization delivery time therefore the total delivery time will not exceed the time window. Currently, the company operates two cars and two treecycle motorbikes. Every vehicle has more than one route every day. Therefore this research problem is Vehicle Routing Problem With Time Window. This problem is solved using the Evolutionary Algorithm method in Microsoft Excel software. The proposed routes can reduce delivery time on two different days by 9.85% and 4.02% for cars, as well as 9.85% and 11.8% on treecycle motorbikes
Perbaikan Tata Letak Fasilitas dengan Pendekatan Simulasi dan Evolutionary Algorithm pada Segmen I PT X Aloysius Fung Elnino Senatra; I Gede Agus Widyadana
Jurnal Titra Vol 10, No 1 (2022): Jurnal Titra Januari 2022
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PT X is a circuit breaker company that produces various types of products. There are several production segments and each segment are used to produce one product type. PT X has conducted an evaluation of the facility layout in segment I, and found the need to improve the facility layout. Shortcomings of the current layout are the arrangement of several facilities, which located outside of the available area for segment I. The arrangement of new production layout, however, should not reduce production output. Production facility re-layout is costly; therefore, simulation is used to analyze the proposed layout. Simulation approach is used to compare the initial layout against the proposed layout. The simulation model was built using Promodel 10 software, with a simulation time of 22.5 hours and replicated for 25 times. The proposed layout is derived using an evolutionary algorithm method, with adjustment in respect to some constraints from the initial layout. The proposed layout can answer the needs of segment I, because there are no facilities that exceed the specified area and result in more products in a day than the initial model.
Pengoptimalan Jumlah Penyimpanan untuk Pengiriman Gas dengan Simulasi di PT X Felita Felita; I Gede Agus Widyadana
Jurnal Titra Vol 10, No 1 (2022): Jurnal Titra Januari 2022
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This research was conducted to analyze the causes of the problems faced by PT X. The company is currently only able to make 46% of the 84 shipments in 2018. This is caused by the accumulation of isotank in the customer's area for a long time. Therefore, the company wants to invest in the addition of permanent storage in consumer areas, simulations are needed to find out the results obtained after the installation of storage. This research was conducted using Promodel simulation software to describe the current situation. The study was conducted in 2 stages, first modeling the initial conditions to obtain a basis for the proposed model, then simulating the proposal and analyzing whether the proposal that was carried out was influential or not. Results of simulation results show that with the addition of permanent storage, the total shipments owned by the company increased to 56% and got its investment capital back after 6.1 years and have present worth value Rp943.839.385.
Co-Authors Aloysius Fung Elnino Senatra Charles Ongko Wijoyo Felita Felita Nova Nova Sepadyati Setiadi Setiadi Yulianto