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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 30 Documents
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Search results for , issue "Vol 5, No 3: October 2024" : 30 Documents clear
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.
Quality Control Analysis with Statistical Process Control (SPC) and Failure Mode Effect Analysis (FMEA) Methods on Battery Products at PT. Selatan Jadi Jaya Putra, I Dewa Gede Rama; Sumiati, Sumiati
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.v5i3.23824

Abstract

PT. Selatan Jadi Jaya is a company that produces lead acid batteries for Automotive Car Batteries. During production, problems often arise, namely the high level of product defects.  These defects more often appear in the burning process, including Melted Tin defects, Burnt Connector defects, Bent Plate defects, and Torn Separator defects. The purpose of this study is to determine the percentage of defects that occur most often and the factors that cause defects and provide suggestions for improving the quality of battery batteries. Based on the above problems, quality control analysis can use methods, namely the Statistical Process Control (SPC) method and improvement efforts using Failure Mode and Effect Analysis (FMEA). Based on the results of research on Statistical Process Control that the dominant defect is Burnt Connector with a percentage of (33%), then followed by Plate Bent by (26%), then Melted Tin by (24%), and Torn Separator by (17%). Based on the results of the Failure Mode and Effect Analysis research, it is known that the highest RPN value is 200 on the tin melt defect with the cause of failure due to errors when workers set the fire too large. The recommendation for improvement for this problem is to adjust the size of the fire in accordance with the procedures set before welding.
Application of Measurement System Analysis (MSA) for Assesment of Tire Pressure Monitoring in Coal Mining Trucks Hia, Selamat W.
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.v5i3.26255

Abstract

Tire pressure plays an important role in ensuring safe operation and performance of truck vehicles. Improper tire pressure always leads to tire life, vehicle safety, and performance. This paper discusses the application of measurement system analysis on truck tire pressure in a coal mining company. The study evaluates the measurement system of truck tire pressure. The company aims to extend the life span of its tire by maintaining and monitoring the tire pressure regularly. The tire pressure is measure by a pressure gauge. This study used measurement system analysis (MSA) to analyze the Gage R&R, with 2 tire men and 10 parts measured with 3 repetitions. The MSA results in a Total Gage R&R of 18.16% with a repeatability value of 12.34% and a reproducibility value of 13.32%. The result indicated that the measurement system showed good results for tire measurement applications because the Gage R&R was between 10% to 30%.
Determination of Gallon Mineral Water Distribution Route at PT. XYZ Using Capacitated Vehicle Routing Problem (CVRP) Az-Zahra Nayak, Rifka Dahayu; Prihadianto, Rahaditya Dimas; Istiqomah, Silvi
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.v5i3.25868

Abstract

PT XYZ is experiencing problems, one of which is in the high cost of distribution because there is no special calculation in determining the route. The implementation of the distribution process carried out by PT XYZ is still ineffective and disorganized. The goal of this study is to determine the optimal distribution route design and provide improvements or input to PT XYZ in the process of distributing goods with minimum transportation costs. Solving the route problem at PT XYZ using the Capacitated Vehicle Routing Problem method with the python programming language through the VRPY package by considering factors such as distance and truck capacity. In the first conditions, there were 24 deliveries with a total cost of IDR 2,484,975 and 11 vehicles. After using the Capacitated Vehicle Routing Problem method, there are 23 deliveries with a total cost of IDR 2,380,000 and 8 vehicles, showing a decrease in distance of 115.7 km or 4%.
Effect of Working Table and Bandsaw Speed on the VZ 400-SA Machine in Obtaining the Optimal Width of Steel Plate Wajdi, Farid; Rahman, Fandi Nur; Supriyadi, Supriyadi
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.v5i3.24341

Abstract

The size of the material test specimen determines the accuracy of the material characteristics. This research was conducted to obtain the optimal tensile test specimen size by optimizing the cut parameters on the VZ-400 SA cutting machine. The material used is SNI 07-2054-2007 standard angled steel with a thickness of 5 mm. Optimization of machine parameters was carried out using the Taguchi method to measure the effect of work table speed (mm/s) and saw blade speed (m/min) on the response to the width of the rectangular cutting product. Cut width limit between 34-36 mm. Data was collected by conducting experiments 9 times with 3 replications. The results showed that the factor that most influenced the size of the width of the cut was the speed of the work table with a contribution of 86.49%, while the speed of the saw blade was 1.64% with an error of 11.87%. The optimal size of the test specimen is produced from the table speed parameter of 2 mm/s and the saw cutting speed of 90 m/min. Cutting validation was conducted in triplicate, and the result showed an average plate width of 34.7 mm with an error of 0.02.

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