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Jurnal Ilmiah Teknik Industri
Published by Universitas Muhammadiyah Surakarta
ISSN : 14126869     EISSN : 24604038     DOI : -
Core Subject : Engineering,
Industrial & Manufacturing Engineering
Jurnal Ilmiah Teknik Industri is a scientific journal that aims to participate in developing the scientific field of Industrial Engineering, contains the results of research and theoretical study from lecturers, researchers and industry practitioners. Jurnal Ilmiah Teknik Industri is administered by the Department of Industrial Engineering, Faculty of Engineering, Universitas Muhammadiyah Surakarta and published by the Muhammadiyah University Press (MUP).
Arjuna Subject : -
Articles 766 Documents
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WORKLOAD ANALYSIS USING WORK SAMPLING AND NASA-TLX FOR EMPLOYEE OF PRIVATE UNIVERSITY IN SURABAYA Widiasih, Wiwin; Nuha, Hilyatun
Jurnal Ilmiah Teknik Industri Vol. 18, No. 2, Desember 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v18i2.8247

Abstract

Employees are valuable asset in an organization. The organization can be defined as two types namely a profit or nonprofit company, and government institution. Employees as a capital human for these organization have big roles for performance measurement. Performance measurement of employee is used to determine whether the worker has been working efficient or not. Workload analysis is defined as analysis of a set or number of activities that must be completed by an organizational unit or position holder within a certain period of time. In this research, it will show employee workload analysis using two approaches in order to complete each other. Firstly, work sampling method was used to determine workload in physically. Secondly, NASA-TLX was utilized to analyze workload in mentally. Pareto method will also take a part for analysis the research result to be more comprehensive. This research has conducted in an East Java?s University-Indonesia. The respondents are employees who have each job description to do their work in each position. The employee?s workload will be calculated both physical and mental. From 25 position observed, show the job position who has strategic characteristic mostly have very high mental workload whereas the job position who has operational characteristic mostly have high physical workload
MODEL PERSEDIAAN DENGAN PERMINTAAN BERGANTUNG PADA HARGA JUAL DAN TINGKAT PERSEDIAAN DENGAN FAKTOR DETERIORASI Adiani, Widyoretno; Lesmono, Dharma; Limansyah, Taufik
Jurnal Ilmiah Teknik Industri Vol. 18, No. 2, Desember 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v18i2.8749

Abstract

Inventory management and control are needed, especially for retailers, to make their business run smoothly. Inventory management is related to the purchase, storage, and sale of goods. Therefore, the determination of the right amount of inventory in hands is crucial in this situation. Low inventory levels will cause a higher probability of shortage, but on the other hand, having a lot of inventory in hands will incur higher holding costs, extra storage space, and deterioration of goods in hands. In this paper, we propose an inventory model with the inventory and price-dependent demand. We also consider a deterioration factor in our model. There are two models developed in this paper, namely the linear deterioration rate model with constant holding cost and the model of the deterioration rate with Weibull distribution with linear time-dependent holding cost. The purpose of the model is to find the optimal price and ending inventory level that maximizes the average profit. Sensitivity analysis is also performed to find the effect of parameter changes in our model to the optimum solution. We found that model with Weibull deterioration rate and linear holding costs will give a higher average profit.
USULAN INTERVAL PREVENTIVE MAINTENANCE DAN ESTIMASI BIAYA PEMELIHARAAN MENGGUNAKAN METODE RELIABILITY CENTERED MAINTENANCE DAN FMECA Afiva, Wirda Hamro; Atmaji, Fransiskus Tatas Dwi; Alhilman, Judi
Jurnal Ilmiah Teknik Industri Vol. 18, No. 2, Desember 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v18i2.8551

Abstract

ABC is a company engaged in the production of automotive spare parts and accessories, especially motorcycles. The problems faced by the company, there is frequent damage to the CNC Milling A. The company applies preventive maintenance and corrective maintenance activities, but these maintenance activities have not yet run optimally. Therefore, a maintenance system is developed to improve machine reliability. The method used is Reliability Centered Maintenance (RCM), with the aim of determining the optimal maintenance interval and estimation of efficient maintenance costs. RCM is done by analyzing the Failure Modes Effect and Critical Analysis (FMECA). The results of the FMECA analysis are in the form of a Risk Priority Number (RPN) that shows the components of rail bearings, spindle bearings, and hoses as critical components of the system. Through the RCM method, the maintenance policy is generated in the form of 2 scheduled on-condition tasks, 2 scheduled restorations, and 3 scheduled discard tasks with maintenance time intervals in accordance with the task category and can save maintenance costs of IDR 175.602.300.
PROMOTING PRODUCT SERVICE SYSTEM FOR MOTORCYCLE: A STUDY OF RIDESHARING PROGRAM INTENTION FOR UNIVERSITY STUDENTS Wiyono, Azis Slamet; Astuti, Septin Puji
Jurnal Ilmiah Teknik Industri Vol. 18, No. 2, Desember 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v18i2.8738

Abstract

The need to reduce air pollutions produced by motor vehicle and traffic congestion is prominent as it improves human health and environmental destruction mitigation. Ridesharing programme is an effort to reduce traffic congestion without preventing people doing mobility and prohibiting them to buy motor vehicle. This paper addresses to investigate the determinant of university student to ridesharing programme. Four variables with descrete items were provided t respondents to be self selected. Those are home address status, type of driving licence, student?s travel behavior to university and intention of student to ridesharing programme. Those variables are analysed in to three models. By using Logistic Regression statictical analysis, this study shows that ridesharing programme intention is influenced by the behavior of student to travel to university. Meanwhile, student travel behavior is influenced by home address status and the ownership of driving licence of students.
DESIGNING THE IMPROVEMENT OF SPAM UNS WATER DISPENSER SERVICE QUALITY Natalianto, Yosua; Pujiyanto, Eko; Sutopo, Wahyudi
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.9413

Abstract

SPAM (Sistem Pengolahan Air Minum or Drinking Water Treatment System) UNS was established in 2015 to meet the drinking water needs of the UNS academic community by providing 129 dispensers and water tap machines spread across buildings at UNS. A survey conducted by UNS students in 2017 showed that 54 % of students were not sure of the quality of UNS SPAM water. So the service quality questionnaire was distributed to 160 UNS students randomly and it was found that only 3 % of respondents stated that they used SPAM UNS water dispenser very often. Processing results shown the highest gap value is in the reliability dimension, with CTS namely cleanliness and flow of water. From the survey regarding the cleanliness and flow of the water carried out the DPMO value of the process was 332,589 (1, 930 sigma) . Recommendations for improvement are in the form of several SOPs to improve the cleanliness and quality of SPAM UNS water dispenser services.
WEST JAVA POTATO FARMERS’ PREFERENCE ON THE QUALITY CHARACTERISTICS OF INDONESIAN VEGETABLES RESEARCH INSTITUTE POTATO VARIETIES Sembiring, Asma; Kusmana, K.
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.10209

Abstract

The availability of a high-quality potato seed will affect the increasing of Indonesia potato production. Indonesia Vegetables Research Institute (IVegRI) attempts to produce various high-quality potato varieties. The potatoes are needed to be disseminated to users. Therefore, they could create benefits in terms of increasing farmers' production and revenue. The objective of the study was to identify West Java potato farmers' preference for the seven potato varieties that have been released by IVegRI. The survey was carried out in Garut district, West Java province, Indonesia. Total, 32 potato farmers, participated in the survey from January to September 2019. The Perceived Quality (PQ) was used to analyze data. The result indicates three potato varieties preferred by potato farmers were Dayang sumbi, Sangkuriang, and Medians, respectively. The result would be useful for the IVegRI to create better potato varieties in the future.
ENERGY-EFFICIENT FLOW SHOP SCHEDULING USING HYBRID GRASSHOPPER ALGORITHM OPTIMIZATION Utama, Dana Marsetiya; Baroto, Teguh; Widodo, Dian Setiya
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.10079

Abstract

Manufacturing companies have a significant impact on environmental damage, and energy consumption in manufacturing companies is a widespread issue because the energy used is derived from fossil fuels. This research aims to minimize energy consumption using develop Hybrid Grasshopper Algorithm Optimization (HGAO). The focus of the issue in this article is the Permutation Flow Shop Scheduling Problem (PFSSP). A case study was conducted in offset printing firms. The results showed that the HGAO algorithm is capable of reducing energy consumption in offset printing firms. The higher the population of search agents and iterations produces less energy consumption. The HGAO algorithm is also compared with the genetic algorithm (GA). The results show that HGAO is more efficient in reducing energy consumption than GA.
FUZZY LOGIC APPROACH TO DETERMINE THE OPTIMUM NUGGET PRODUCTION CAPACITY Santosa, Sesar Husen; Sulaeman, Suhendar; Hidayat, Agung Prayudha; Ardani, Ilham
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.10295

Abstract

This research aimed to present the Fuzzy approach in determining the optimal production capacity of the Nugget Production. The Fuzzy Model was developed by using two membership sets; i.e. the Overall Equipment Effectiveness (OEE) variable membership set of the production machine and Nugget Demand Forecasting. Nugget demand forecasting uses an exponential smoothing method due to its time-series type of query history data. OEE values were calculated using Availability, Performance and Quality Yield. In the Fuzzy approach, the Forecasting Membership Set uses the Triangular Membership Function type, and the OEE Membership Set uses the Trapezoidal Membership Function type. The fuzzy set model produced can be used as a tool for the company in determining the value of the Optimal Capacity production so that demands can be fulfilled and the product stocks decrease.
THE EFFECTIVENESS MODEL OF KNOWLEDGE SHARING IN BUSINESS INNOVATION TO IMPROVE THE PERFORMANCE OF MICRO SMALL AND MEDIUM ENTERPRISES Putro, Bramantiyo Eko; Ilmaniati, Anita
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.10231

Abstract

Innovation performance can be an important indicator for organizations because it can enhance competitive advantage. In the organizational context, the results of innovation can be drawn by increasing efficiency, productivity, quality, competitive advantage, and market development. Micro, small, and medium entreprises (MSMEs) generally have to face challenges such as limited financial resources, sub-optimal operations, inefficient supply chains, limitations in technology application, and unpreparedness in facing competition and market changes. To be able to face this challenge, MSMEs need to take an innovative approach in business operationsThis study aims to improve understanding of the effectiveness of knowledge sharing in organizations. An understanding of knowedge sharing activities through the business innovation process is expected to be able to produce a mechanism to improve MSME performance. Research data were obtained by distributing questionnaires directly and online to SMEs Data processing is done by testing the conceptual model using PLS-SEM.  The conceptual model was tested with 137 samples obtained directly and online from MSME actors. From the test results, it can be seen the factors that encourage knowledge sharing activities so that they can influence business innovation and encourage the performance of MSMEs namely trust, organizational culture, organizational structure, employee attitudes, and motivational methods.
REDUCING ENVIRONMENTAL IMPACT ON SME METALS PRODUCTION PROCESS USING LIFE CYCLE ASSESSMENT AND ANALYTICAL HIERARCHY PROCESS METHOD Faishal, Muhammad; Arfan, Muhammad Noor; Asih, Hayati Mukti
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.10041

Abstract

The ABC metal SME produces some wastes, such as liquid waste, solid waste, and smoke. The problem is hazardous waste dumped directly into the environment without any waste treatments which had bad impact on the environment around its SME. Therefore, this research is proposed to improve the production process of metal that can reduce the environmental impacts. The Life Cycle Assessment (LCA) method is developed to identify all the processes that have an impact on the environment and also to calculate the energy used. The values of environmental impact are calculated using Simapro 9.0 Software. In addition, Analytical Hierarchy Process (AHP) method is employed to determine the best alternative fuel according to four criteria, such as temperature, price, emission, and fuel consumption. The results show the process that has the greatest environmental impact is the metal smelting process. It is caused by the source fuel in this process was used oil. The usage of used oil can be the sources of air pollution that causing health problems in the respiratory tract such as bronchitis and asthma. Some alternative fuel was proposed, however, fuel gas is the best alternative among others according to the expert opinions. For the managerial insight, this research can be suggestion for SME to choose the best fuel in the production process that considering economic and environmental aspects.

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