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Humiras Hardi Purba
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IJIEM - Indonesian Journal of Industrial Engineering & Management Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana Kampus Menteng - Gedung Tedja Buana, Floor 4th Jl. Menteng Raya No. 29 Jakarta Pusat- Indonesia Tlp.: +62 21 31935454 Fax: +62 21 31934474
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INDONESIA
Indonesian Journal of Industrial Engineering & Management
Published by Universitas Mercu Buana
ISSN : 26147327     EISSN : 27459063     DOI : https://dx.doi.org/10.22441/ijiem
Core Subject : Science, Engineering,
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering
The journal aims to advance the theoretical and applied knowledge of this rapidly evolving field, with a special focus on industrial engineering and management, organisation of production processes, management of production knowledge, computer integrated management of production flow, enterprise effectiveness, maintainability and sustainable manufacturing, productivity and organisation, forecasting, modelling and simulation, decision making systems, project management, innovation management and technology transfer, quality engineering and safety at work, supply chain optimization. Indonesian Journal of Industrial Engineering & Management is published under the auspices of Universitas Mercu Buana. The main purpose of Indonesian Journal of Industrial Engineering & Management is to publish the results of cutting-edge research advancing the concepts, theories and implementation of novel solutions in modern manufacturing and services. Papers presenting original research results related to industrial engineering and management education are also welcomed.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 199 Documents
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Optimization Unloading Time Container Use Multiple-Channel Queuing Model at Car Industry Fitra, Adi; Suhendra, Suhendra; Wiyatno, Tri Ngudi
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.24198

Abstract

The development of the car assembly industry in Indonesia is increasing from year to year and competition is getting tighter. To be able to compete in the competition, a system with low costs is needed. Logistics is an activity that does not add value and logistics is also included in the price formation elements. Logistics costs in Indonesia are high, reaching 30% of the total product. Waiting time for containers to be unloaded is a hidden cost and can reduce service levels. The aim of this research is to reduce waste when waiting to unload containers which is related to the capacity of the area waiting to unload containers. The method used is the Multiple-Channel Queuing Model queuing method where analysis is carried out to reduce waiting time so that there are no containers waiting outside the cross-dock warehouse. The results of the research found that by increasing the number of containers unloading docks, the unloading time could be reduced from 2.25 hours to 1 hour and increase the service level where the container waiting area which initially required 5 parking lots became 2 container parking lots. Not only can it reduce the number of queues outside the warehouse and reduce waiting times. In this study, it was found that by adding docking from 2 to 3, it can make a cost reduction of 1 million per month because there is no need to pay overtime costs to unload containers.
Measurement of Line Balancing in the Production Process Copper Cathode at PT. Smelting Using Ranked Positional Weight (RPW) Method Wardana, Muhammad Donny Putra; Saifuddin, Joumil Aidil
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.23322

Abstract

Line balancing is required in the production process. Without a balanced production line at work stations, the production process is less effective and efficient. Refinery at PT. Smelting has a type of mass production process, so it is planned to determine the optimal production line so that the loading on each work station will be more evenly distributed and reduce idle time. The method used is the measurement of working time with a stop watch. the data used is the work element and the time needed by the operator to complete the copper cathode production process which is from the anode arriving at the Anode Preparation Machine (APM) until the copper cathode is finished strapping at the Cathode Washing & Stripping Machine (CWSM). There are two results of the analysis,based on the first analysis that by using the line balancing method, the company can achieve a line efficiency of 78.10% and reduce the balance delay by 15.11% which is from 37.01% to 21.90%.
The Influence of Product Quality and Location on the Purchase Decision in Bakso Damas Malang Rahmadhani, Aisyah; Murtiyanto, Rizky Kurniawan
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.27048

Abstract

In today's globalized world, the culinary industry has seen remarkable growth, with product quality and strategic location being crucial factors. This study, titled "The Influence of Product Quality and Location on Purchase Decisions at Bakso Damas Malang," examines how these elements affect consumer choices, focusing on a prominent meatball vendor facing quality challenges despite a commitment to freshness. The urgency of this research stems from the rapid expansion and fierce competition in Malang's culinary sector. Quantitative analysis is essential to assess the impact of product quality and location on purchasing decisions. This research involves a substantial sample and employs a variety of data collection methods, including interviews, questionnaires, and observations, both online and offline. Validity and reliability tests ensure the robustness of the research tools, and a comprehensive analytical approach is used. The study finds that product quality and location significantly influence consumer decisions, with 71.8% of purchase decisions attributed to these factors, as indicated by the coefficient of determination (R2). The F-statistic test further confirms the combined effect of these variables. The study concludes that prioritizing product quality and strategic location is vital for businesses like Bakso Damas Malang to achieve sustained success and high consumer satisfaction.
Comparative Study of RCCP and System Dynamics in Productivity Capacity Purwojatmiko, B. Handoko; Cessari, Raissa Annisa; Ambarwati, Laksmi; Sumasto, Fredy
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.23806

Abstract

One of the manufacturing companies in Indonesia which is engaged in foundry has a production line for various types of automotive components and has produced 2051 types of products. One of the products produced is the Trunion Bracket. In the molding process, cores are needed that can provide cavities in the product. The current production process has not been able to meet demand because the production cycle time does not match the predetermined time. This discrepancy will affect consumer satisfaction. Therefore, it is necessary to make a schedule for the period July to December 2022, to assist companies in facilitating the scheduling of the production process using Rough Cut Capacity Planning and System dynamics. The calculation results from Rough Cut Capacity Planning indicate that the 5th workstation experienced a shortage of production time from July to September 2022, so an additional number of working hours had to be made. The addition of the number of working hours before improvement was 367 hours and after improvement was 112 hours. Meanwhile, the results of system dynamics modeling for the period July to December 2022, require an additional working hour before improvement by 308 hours and 205 hours after improvement are carried out. The companies can implement strategies based on the results of system dynamics simulations to identify, forecast, and plan production capacity requirements for the next.
Preventive Maintenance Analysis to Improve the Readiness of Heavy Equipment Hydraulic Excavator Liebherr R9250 & R9350 with Six Sigma Method at PT. XYZ Putri, Icha Ayu Azzara; Sitania, Farida Djumiati; Sukmono, Yudi
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.22917

Abstract

PT. XYZ is a company in the field of coal mining. The mining production process is carried out by open pit mining, meaning open mining. One of the activities carried out in the production process at PT. XYZ is overburden removal. The excavator used for overburden removal consists of 2 types Liebherr R9250 and R9350. Based on an initial survey, a breakdown occurred on the Liebherr R9250 excavator engine, experiencing a lubrication system failure, and the R9350 experienced a cooling system failure, so the engine was stuck. The purpose of this research is to overcome the problem of unscheduled unit breakdowns on Liebherr R9250 and R9350 hydraulic excavators at the coal mine project PT. XYZ using the Six Sigma method by formulating Define, Measure, Analyze, Improve, Control (DMAIC) that occurs. The results showed that the R9250 and R9350 excavators at the Six Sigma achievement level were in the 1-Sigma category or at the lowest level, with a very uncompetitive description of the quality of the unit's readiness during the production process. This shows that better improvement is needed to support the quality of unit readiness. Based on this research, the recommendations that can be given are that the company needs to improve human resources, monitor spare parts stock, implement maintenance methods, and improve the quality of unit readiness, operation of tools, customizing spare parts specifications, and provision of company facilities.
Analysis of Fabrication Material Inventory Control Strategy Using AHP, MUSIC-3D and MIN-MAX STOCK approaches at PT. Bangun Teknik Purba, Arini Anestesia; Rohmatin, Yuli Nuri; Karim, Abdul Aliul
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.26020

Abstract

PT Bangun Teknik Baja is a manufacturing company engaged in Fabrication, Repairing, and Machining for heavy mining equipment. The company does not yet have a basic strategy in carrying out inventory planning actions, so the amount of material ordered is only based on the estimated number of production product needs. Therefore, excessive amounts of inventory (overstock), lack of inventory (out of Stock) and frequent occurrence of Deadstock often occur. Order data, usage data and stock data on 50 types of fabrication materials with an average of 25 materials experiencing overstock, 4 materials out of stock and there are 221 Deadstock materials from August 2021 to July 2023 are used as the basis of this research. To determine the most suitable inventory control strategy according to the needs of PT Bangun Teknik Baja, processing is carried out with AHP, Music-3D with ABC, FSN and SDE Classification, and Min-Max Stock. AHP produces the most important priority classification dimension criteria, namely ABC, FSN and SDE with the most important sub-criteria being A,B,C,F,S,N,D,E,S. These results are used as a reference for Music-3D processing which produces 9 groups of material categories according to their respective characteristics of importance, namely AFD, AFE, ASE, BFE, BSE, CFD, CFE, CSD, and CSE, the 9 categories obtained their respective policy solutions by applying Min-Max Stock, by obtaining minimum and maximum limits on each material to minimize waste. ROP and Safety Stock calculations are used to minimize Overstock in minimizing Deadstock and Out Of Stock to minimize losses, so it is proven that the application of Min-Max Stock can save Total Inventory Cost by 1.45% from the company's actual policy.
The Proposed Quality Improvement of Incense Products Using the Six Sigma Method at UD. Dupa Karya Mandiri Fearnanda, Yuanita Lucky; Zunaidi, Rizqa Amelia
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.24274

Abstract

In 2023, Indonesia's Hindu population accounted for approximately 1.7% of the total population, equating to roughly four million individuals within a populace of 250 million. UD. Dupa Karya Mandiri being a prominent producer of incense products in high demand. However, during the 2023 Chinese New Year (Imlek) and Nyepi celebrations, expected to spur increased demand, the market witnessed a downturn due to a surge in defective product rejection. This study aims to describe the factors that cause product defects, measure the level of sigma level in incense production, then proceed with efforts to improve product quality. Six Sigma methodology is used to handle this problem, this study employs the Six Sigma methodology. The analysis yielded a sigma value of 2.1 and a DPMO (Defects Per Million Opportunities) value of 289,228.10, signifying the necessity of further enhancement in quality to reduce the number of defective products and elevate the sigma value. Therefore, this research gives recommendations for improvement to UD. Dupa Karya Mandiri includes SOPs for Drying, Understanding the Production Process, Machine Maintenance, Bamboo Encek Replacement and Monthly Production Reports.
Optimazion Analysis of Temperature and Fermentation Controlled Chamber (TFCC) with Hybrid System to Control Fermentation on Tape Rofi'i, Ahmad; Purnomo, Fendik Eko; Afriansyah, Faisal Luthfi
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.23373

Abstract

The aim of this research is to determine analysis for optimizing tape fermentation using a Temperature and Fermentation Controlled Chamber (TFCC) with a Hybrid System. The resulting numerical model was analyzed using a non-linear differential method using Runge-Kutta. The thing that was analyzed was the change in the rate of yeast concentration, the rate of change in the concentration of ethanol and glucose resulting from the fermentation process. TFCC with Hybrid System Technology is equipped with an automated system accompanied by sensors that detect food quality and can be directly observed through the LCD screen integrated in the device. The research method used is experimental research by designing a tool that can be used to produce/cook fermented foods while monitoring pH, alcohol, glucose levels and temperature levels which are integrated in a set of tools called the TFCC with Hybrid Systems Technology . From the numerical explanation, it can be seen that when t is small, the rate of yeast development in the fermentation process will be small, the number of yeast cells is still small. As a result, the growth rate will be slow. This can be seen from the graph of the increase in X(t) and P(t) as well as the graph of S(t) which is still slow. The greater the time t, the rate of yeast consumption is also greater because the number of yeast cells is also increasing. As a result, the growth rate of ethanol and sugar is also large. This can be seen from the graph of an increase in X(t) and P(t) as well as a graph of a faster decline in S(t). When the maximum consumption rate is reached, then the values of X(t), S(t) and P(t) are constant. The amount of concentration in the resulting ethanol is close to the initial concentration of sugar produced.
Utilization of Siwalan Waste (Borassus flabellifer L.) as a Prototype of Active Carbon-Based Batteries Using Brunauer Emmett Teller (BET) and Analysis of Variance (ANOVA) Method Nugraha, Isna; Anshori, Husna Zaka; Arier, Tivani Nava; Aliya, Izra Noor; Ningrum, Dwi Mulyati; Gufron, Achmad
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.23892

Abstract

Currently, electricity use in Indonesia has soared and continues to increase every year. New renewable energy will be the main alternative for the country as a source of electricity. Alternative energy sources can come from biomass such as Siwalan shell waste. This waste has a composition of 18.52% hemicellulose, 11.90% cellulose, 0.23% lignin, 0.1% nitrogen, 13.80% water, 4.46% ash, 44.58% carbon and 6.41% volatile matter. % which is the chemical component of the basic ingredient for making activated carbon. Thus, the aim of this research is to determine the capacitance of a battery prototype from activated carbon from Siwalan shell waste. The method used is a quantitative method by taking data from the results of the Brunauer Emmett Teller test and the Cyclic Voltammetry test. Carbon is activated using KOH with varying concentrations of 1 M; 1.5 M; 2M; 2.5 M. The results of the surface area of activated carbon in the BET test were 13,636 m2/g; 20,941 m2/g; 28,191 m2/g; and 29,871 m2/g and in manual calculations using the BET method it was obtained 13,647 m2/g; 20,950 m2/g; 28,197 m2/g; and 29,875 m2/g. From testing and manual calculations, Siwalan shell carbon at a KOH concentration of 2.5 M has the largest surface area and has the potential to be the best active carbon material for making battery prototypes.
A Systematic Literature Review of Six Sigma Approach in Manufacturing and Services Industries in Indonesia Maryani, Edna; Jaqin, Choesnul; Tampubolon, Salmon
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.25250

Abstract

The present work is a review of literature, to identify the improvements acquired from the application of the Six Sigma methodology in manufacturing and services industries in Indonesia. This systematic review intends to identify how manufacturing research is contributing to the development of the Industry in Indonesia agenda and for a broader understanding about the links between the manufacturing and services sectors.  This systematic review intends to identify by mapping and  summarizing existing research efforts, identifying research agendas, as well as gaps and opportunities for research development. The papers were selected base on relevant articles to the topic of work, and the bibliographic databases used for the research were the Google Scholar, ScienceDirect, ResearchGate, etc. The study counted on 50 articles to better exemplify these points, being 36 focused on the manufacturing sector and 14 on the services sector. In both sectors the variability of the process, improving process quality, productivity, efficiency, the service provided, increasing customer satisfaction, reducing costs, timeliness. It has been found that Six Sigma is a versatile tool that can be adapted and applied in any segment, allowing potential opportunities for new research and applications. Basic tools for brainstorming such as Pareto analysis and cause-effect analysis are definitely used in both industries: manufacturing and service.

Page 12 of 20 | Total Record : 199

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