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All Journal Jurnal Teknik Industri J@TI (TEKNIK INDUSTRI) Jurnal Infra Jurnal Titra Jurnal Sistem dan Manajemen Industri
I Gede Agus Widyadana
Faculty of Industrial Technology, Industrial Engineering Department, Petra Christian University. Jl. Siwalankerto 121-131 Surabaya. 60236
Computer Science & IT Engineering Industrial & Manufacturing Engineering Transportation

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Pengembangan Model Rantai Pasok Pisang Mas di Lumajang dan Malang Gunawan, Gerry Anggian; Widyadana, I Gede Agus; Palit, Herry Christian
Jurnal Titra Vol 2, No 2 (2014)
Publisher : Jurnal Titra

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Abstract

Pisang Mas (Musa acuminata colla) is one of important commodities in East Java. Previous study showed that there are two different supply chain models at Lumajang and at Malang. In these paper, we combine different supply chain models and considers the effect of price on customer demand. This model is simulated using Vensim PLE software. The result shows that demand is affected by price change. This model is sensitive to price with percentage of 12,4% in retail and 13,04% in traditional market.
Penurunan Waste Proses Produksi Produk RJK di Departemen DEW PT. X dengan Value Stream Mapping Saputra, Franky; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 2 (2013)
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Abstract

PT. X wants to increase profit that obtained from RJK product. Increasing the price can make RJK product will lose with its competing product. PT. X chooses to eliminate wastes that exist in production so higher profit can be obtained. PT. X wants to eliminate non value added activity that exists in RJK production process. Identification waste is done by the help of value stream mapping. Some wastes are located on Main line, CR line, and BYM line. Those wastes happen because of a lot of breakdown on combine line, over bulking, and BYM line does not have independent line because BYM line does not have a cutter. Combine line’s breakdown mainly caused by too long blend changeover or BCO time. Some improvements are done to eliminate waste on Main line, CR line, and BYM line. SMED concept is applied to speed up the BCO time so breakdown time of combine line will reduce. Alarm or visual alert installation is done so overbulking does not happen again. Searching for cutter at other affiliate is done so BYM line has independent line. Those improvements give impact by reducing NVA about 2.44 % at Main line, 0.48 % at CR line, and 1.4 % at BYM line.
Value Stream Mapping sebagai Upaya Pengurangan Waste di Departemen S PT A Sudjianto, Novitriana Anggraini; Bendatu, Liem Yenny; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 2 (2013)
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Abstract

PT A is a manufacturer company which produces cigarette. PT A wants to do continuous improvement by keeping on reducing waste in S department. Value Stream Mapping (VSM) is a method that has been used to identify value added activity and non value added activity (waste) in that company.Based on the current value stream mapping of brand Y, there are 3 types of wastes which are inventory, transportation, and waiting. The proposed improvements will reflect in the future value stream mapping and reduce the total lead time by 5.82 %.
Perbaikan Work Cell XCSPA dengan Metode Lean Six Sigma Hansen, Chris; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 2 (2013)
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This study discuss about XCSPA product’s work cell with lean problem WIP after curing process with the maximum location capacity 2640 pieces. Quality issue with main problem contact resistance has resistance value above 25 mΩ, will impact to product function. This study objective is doing improvement to work cell with Lean Six Sigma Method, for improve lean problem and quality issue. In this research, DMAIC is used to solve the problem, however we did not discuss the Improve step. Value Stream Mapping tool used for knowing value added and non-value added process with improvement opportunity. Quality tool using Process Failure Mode & Effect Analysis (PFMEA) for finding cause of problem and potential problem can be happened in XCSPA Work Cell. Reduction of WIP by rearrange WIP quantity between process that will reducing about 85.49% WIP quantity from VSM current state WIP quantity. Quality issue eliminated by change and modify production process. Eliminate quality issue will impact to CNQ reduction for the reject product. Target achievement stated has accomplish that was reduction of PLT from contribution of WIP reducing, otherwise MDR, PRR still can’t be monitored. There’s 26 improvement suggestion, with 11 suggestion done, 7 suggestion in progress, 5 suggestion not yet implemented, 3 suggestion aborted.
Penyelesaian Permasalahan Multi-tour Inventory Routing Problem dengan Particle Swarm Optimization Budiman, Syarif Daniel; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 2 (2013)
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Abstract

The Inventory Routing Problem (IRP) has become a problem that thoroughly studied recently. One of the IRP models that have been developed was an IRP multi-tour, which described a single distribution center r with a set of salespoints. The salespoints is served by a limited number of vehicles with finite load capacities. Vehicle will replenish the salespoints by making a multi-tour route. Each multi-tour consists of a set of sub-tour involving salespoints to be replenished. The multi-tour solution has increase the complexity of the model compared to the normal tour IRP model. Therefore a Particle Swarm Optimization (PSO) algorithm has been proposed for solving a sequential problem in allocating salespoints to the route. Some heuristic methods also been developed for creating the multi-tour. The validity of the algorithm, along with comparison with other existing algorithm, has been provided to validate the proposed PSO algorithm. Result obtained has shown that the PSO algorithm having a promising performance in solving the problem.
PENGEMBANGAN MODEL SUPPLY CHAIN PISANG MAS DI JAWA TIMUR Sanada, Wilson; Widyadana, I Gede Agus; Palit, Herry Christian
Jurnal Titra Vol 2, No 1 (2014)
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Abstract

Musa acuminata paradisiaca is one of banana varieties, has a high demand in East Java thus highly potential to be developed. The highest production sites are located at Malang and Lumajang. Unfortunately, this type of banana are perishable that limited the selling period. An alternative way to solve is via improving the supply chain management. In this research, we developed some supply chain models and evaluate there performance using simulation with Vensim software. We used sales profit, lost sales, oversupply and availability to measure performance of the models, supply chain management at Malang and Lumajang. The results show that supply chain at Lumajang performed better than Malang interms of sales profit, lost sales and availability.
Perancangan Sistem Suplai Tanpa Penambahan Tempat di PT Toyota Motor Manufacturing Indonesia (PT TMMIN) Suganda, Christianto Felix Juwono; Widyadana, I Gede Agus; Palit, Herry Christian
Jurnal Titra Vol 2, No 2 (2014)
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Abstract

PT Toyota Motor Manufacturing Indonesia (PT TMMIN) in 2014 is preparing the implementation of new engine type TR-Kai. Additional types of engine TR-Kai need additional type of new components too. Additional types of TR-Kai component means need additional space for placement, but the problem is unavailable space. The supply system design method includes layout change, equipment (material handling) and also system (works cycle) which is delivered well. The countermeasure idea is to change the material handling usage and also implementation direct supply system. Direct supply system in regular working time has reduced lead time almost 2 days of safety stock. Direct supply reduces 33.3% of inefficient handling, reduce hoist usage (safety matter) between 80,2% up to 93.4% each day, and also reduce 81.5% of forklift usage (safety matter). The evaluation result of this system is able to reduce 33.3% of manpower supply and monthly cost saving up to 46.2% with a Break Event Point (BEP) during 4 years 7.5 months.
Penentuan Ukuran Pemesanan Material dengan Memperhatikan Decay Inventory dan Quantity Unit Discount Wijaya, William Surya; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 1 (2013)
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Abstract

In this paper we develop decay inventory with quantity unit discounts models. The models are built by considering purchasing and saving cost. The models are compared with Wagner Within model. The analyzes are conducted using a sensitivity analysis to changes in deteriorating rate, setup cost, inventory cost, purchase cost and changes in the number of demand. The model analysis is done by generating 50 random data. Result from the study shows that savings cost model 1.4% is better than purchasing cost model. The cost of Wagner Within model is 1.5% lower than the model with purchasing cost and  not significantly different than the model that consider the savings cost. 
Perancangan Sistem Perencanaan dan Penjadwalan Produksi di PT. Bondi Syad Mulia Sia, Renny Olivia; Widyadana, I Gede Agus
Jurnal Titra Vol 1, No 2 (2013)
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Abstract

This research is a case study conducted at PT. Bondi Syad Mulia, which is a galvanishing services company. Production planning at PT. Bondi Syad Mulia combined with production department, so that the work does not focus and cause some problems in production planning. The proposed planning system is set up the PPIC department, so that production planning does not interfere with affairs that must be done by the production department. Another issue that arises is the production delays because there is do not have a good system of production scheduling. Determine the right scheduling for a company is very important, but not easy, especially for a service company that manufactures a wide range of products. This thesis aims to get the system scheduling to minimize makespan, thus increasing the amount of output produced. The method used to achieve these criteria is Algorithm Campbell, Dudek, and Smith (CDS) and Shortest Processing Time method (SPT). CDS scheduling algorithm results provide several alternative job sequences that generate makespan value is almost the same, but there is a job sequence that produces the smallest makespan value compared to other alternative job sequences.
Pengurangan Jumlah Produk Setengah Jadi di PT. SEMB-PEL Setiawan, Rizal; Widyadana, I Gede Agus; Palit, Herry Christian
Jurnal Titra Vol 2, No 2 (2014)
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Abstract

The need for work in process on PCBA production line can be caused by fluctuating demand for PCBA products. Amount of work in process on production line that company wanted is between 3 up to 7 inventory days. Average current amount of work in process before implementation of proposed improvement is 12.03 inventory days. Root causes anaylise uses root cause tree. There are two proposed improvements, which are improvement on work in process update’s system and improvement on material distribution to every work station. Proposed improvement that can be implemented is improvement on material distribution of every work station. Average amount of work in process after implementation the improvement is 6.72 inventory days.
Co-Authors Alfeus, Alfeus Andree Pamungkas Anthony Gunadi, Anthony Anthony Reinaldo Halim Chris Hansen Christian Yoko Wijaya Christianto Felix Juwono Suganda Christine Christine Cynthia Candradewi, Cynthia Davita, Johana Kezia Didik Wahjudi Djoni Haryadi Setiabudi Edwin Hendrawan, Edwin Edwin Sebastian, Edwin Elsie Elsie Erwin Pratama Wijaya, Erwin Pratama Felecia Felecia Felicia Saputra, Felicia Fenny Nilawati Kusuma Ferdiarto Limantoro, Ferdiarto Fernaldi Darmasaputra Leksono, Fernaldi Darmasaputra Fianty, Bella Eka Franky Saputra Gerry Anggian Gunawan Haris Lienardo Herry Christian Palit I Nyoman Pujawan I Nyoman Sutapa Karine Santoso Putri Lala Febriana Lay, Jordan Liem Yenny Bendatu Lukita, Sandra Lumanto, Jason Averell Meylinda Pramono, Meylinda Novitriana Anggraini Sudjianto Otto Pratama Randy Christian Wongso, Randy Christian Renny Olivia Sia Rizal Setiawan Robert Karyahastana, Robert Sonny Sugiarto, Sonny Stanley Surya Jaya Syarif Daniel Budiman Tanti Octavia Theresia, Juliet Wibisono, Richard William Surya Wijaya Wilson Sanada