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INDONESIA
Journal of Engineering and Management in Industrial System
Published by Universitas Brawijaya
ISSN : 23383925     EISSN : 24776025     DOI : -
Core Subject : Engineering,
Industrial & Manufacturing Engineering
Journal of Engineering and Management in Industrial System is a peer reviewed journal. The journal publishes original papers at the forefront of industrial and system engineering research, covering theoretical modeling, inventory, logistics, optimizations methods, artificial intelligence, bioscience industry and their applications, etc.
Arjuna Subject : -
Articles 216 Documents
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STRATEGY FRAMEWORK DEVELOPMENT BASED ON BUSINESS COMMERCIAL INTEGRATING CO-CREATION PROCESS TO GUIDE PSS TRANSITION Kusumaningdyah, Widha; Himawan, Rakhmat; Ardianwiliandri, Raditya
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 1 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.01.7

Abstract

Product-Service System (PSS) is considered as a promising solution for manufacturing industry to address environmental and economic issues simultaneously. Despite the potential benefit, PSS uptake across industries is hardly found. This research aims to draw current state of manufacturing industry upon theoretical framework of PSS typology to get insights of the gap in between. The study exhibits PSS level assessment indicated by key character identified from the various literature of PSS typology. The study also introduces co-creation process as a strategy to increase system capability within PSS framework. Manufacturing companies are selected from various source of literature and article in PSS discussion to exercise PSS assessment. The evaluation of PSS current practice reveals that commercial based transaction (B2B and B2C) play a significant role to determine the suitable development strategy for PSS transition. Furthermore, the type of business commercial also determines the customer involvement level in co-creation process. A framework to guide PSS transition based on the business commercial is established, comprehends the type of value proposition, suitable business strategy, network configuration, and co-creation level.
PROPOSED STRATEGY OF MRO OPTIMIZATION IN COST-EFFECTIVE PROGRAM BY USING KEPNER-TREGOE ANALYSIS AND ANALYTICAL HIERARCHY PROCESS (AHP) Ariawan, Yona; Yudoko, Gatot
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.3

Abstract

ADC Company is a global company which operates in the Middle East that has been running to supply the downstream users with its product such as Ethylene, Polyethylene and Polypropylene. The current performance and objectives show that we need to take a look at something that can be done possibly and take the initiative that can be improving the company’s performance, especially in this kind of situation. The current setup of Maintenance Repair and Operations or MRO of this company, has shown the value that this company has 43% Non-Moving Spare Part (PNM-SP) Material value that is excessive and has turned into a particular issue for the Company. However, there is an opportunity for the company to make more effective inventory through the inventory policy strategy and improvement. The higher the inventory value and the remaining items/materials that cannot be utilized, then the worse the inventory performance reflects. Therefore, the business problem could be identified and further transformed into a problem statement as Significant Potential Non-Moving Spare Part (PNM-SP) Materials all across the years have resulted in the inefficiency of Operational Expenditures (OPEX) which costs the company with unused/ never used bought materials associated with handling and maintaining cost produced by those (PNM-SP) materials. The objectives of this research are overcome or reduce the volume of Potential Non-Moving Spare parts (PNM-SP) Materials in our organization, and What tactics or alternative solutions exist to avoid massive Potential Non-Moving Spare parts (PNM-SP) Materials, along with the precautions that should be taken in the event happens in the future, by using Kepner Tregoe Analysis and Analytical Hierarchy Process (AHP). In this scenario, we will be utilizing some feedbacks from our references along with their major result.
THE EFFECT OF AGE, SLEEP DURATION, LEARNING DURATION, AND COFFEE INTAKE ON SHORT-TERM MEMORY Chandra, Huki; Istiqomah, Silvi; Purnama, Adhitya Rinda Wahyu; Rafsanjana, Sasotya Rigan; Rosyid, Ahmad Nur
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.2

Abstract

In the reality of life, learning requires a process of remembering. In the process of teaching and learning, memory is crucial. Sleep deprivation affects the process of remembering in learning. Memory is one of the important aspects that affect student performance in learning. In addition to sleep duration, the age factor can also affect short-term memory. This study wants to find out if age, sleep duration, and learning duration have an impact on short-term memory. This study incorporates elements of cognitive ergonomics because it measures short-term memory performance to assess how people process information and how they maintain it in their memory. The age variable has a significance value of 0.001. The coefficient value on the age variable is 0.303 and is positive. This positive value indicates that increasing student age will increase the value of short-term memory. This shows that the higher the age of the student, the higher the ability in short-term memory. The study participants comprised individuals in the 18-22 age group. The findings demonstrate a significant impact of age on short-term memory proficiency. Students of higher age groups have accumulated several years of academic experience and have effectively refined their ability to handle memory-intensive lectures through their senior years, thereby enhancing their short-term memory capabilities. Thus, new students should allocate additional attention to enhancing their short-term memory skills. Furthermore, the study reveals that students who consume coffee exhibit notably elevated levels of short-term memory, underscoring the considerable impact of coffee consumption in enhancing this cognitive skill among students.
LEAN SIX SIGMA APPROACH TO IMPROVE THE PRODUCTION PROCESS IN THE GARMENT COMPANY: A CASE STUDY Fibriani, Lenny; Garside, Annisa Kesy; Amallynda, Ikhlasul
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.7

Abstract

A company engaged in the garment industry is facing problems that inhibit the production process. These problems comprise an excess of product defects beyond the specified limits, a considerable rate of product returns, delays in product shipment, and disorderly arrangements in storing raw material. This study aims to determine the root causes of problems and provide recommendations for improvement using the concept of lean six sigma. The waste assessment model is used to identify the dominant waste, while the value stream analysis tools is a method used to analyze the causes of the dominant waste. From the research results, four dominant wastes are identified, namely waste defects, unnecessary inventory, waiting and unnecessary motion, with percentages of 27.02%, 15.92%, 14.32% and 14.0% respectively. The results of the analysis using mapping tools show the details of waste in each dominant waste. Proposed recommendations for improvement are made using the failure mode and effect analysis based on the highest risk priority number for each dominant waste. The recommendations proposed by the researchers include implementing a standard operating procedure and work instruction for the sewing process; scheduling machine maintenance using reliability centered maintenance II; planning and scheduling materials using material requirement planning; implementing line balancing; and designing name tags, visual displays, and storage rack layout.
ANALYSIS OF WORK ENVIRONMENT AT BLOW MOULDING STATION USING 5S METHOD AND FISHBONE DIAGRAM Panjaitan, Nismah; Yuman, Syafiq Alhadi
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.4

Abstract

A good work environment will increase job satisfaction, morale, and employee performance. The company has 5 production stations, namely Printing and Can Making, Blow Moulding, Shortening and Margarine, Filling, and the last is Finished Product Store. Based on observations at the Printing and Can Making, Blow Moulding, Shortening and Margarine, Filling, and Finished Product Store stations, there are unclean and untidy conditions at the Blow Moulding station. Fishbone diagrams are also used to determine the root causes of work environment problems. The cause of the Blow Moulding station being unclean and untidy is the human factor and the method applied. Based on the problems obtained  the 5S method is used to arrangement and maintenance of the workplace which was developed through intensive efforts in the work environment of the blow moulding station. When everything has its place and there is the right position, then the 5S program will serve to provide a clear picture of a good workplace.
A DECISION-ANALYTIC, SIMULATION BASED MANAGEMENT MODEL FOR A TWO-SHIFTS QUEUE SYSTEM WITH CUSTOMER RENEGING Chew Hernández, Mario Luis; Viveros Rosas, Leopoldo; Velázquez Romero, Verónica
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.6

Abstract

This paper shows a management model for a queuing system operating two shifts and where client reneging is present. The model provides the optimal active server policy considering lost clients and cost. Using influence diagrams and decision trees, the proposed model implements a Bayesian scheme to update the initial knowledge in response to the observed number of lost customers in the first shift. In addition, a utility function is used to represent the preferences of the decision-maker and simulation to determine the consequences and probabilities of the trees. The results are displayed as the number of active servers recommended for each shift, according to the preferences of the decision-maker and the clients lost in the first shift. For the case study, it is found that if the weight for the number of lost clients in the utility function (kNL) is less than 0.63, a single server should be used in both shifts, while when kNL is greater than said value, the first shift opens one server, while a second one is activated for the next shift depending on the number of lost clients in the first shift.
ANALYSIS OF PHYSIOLOGICAL ERGONOMICS FOR NIGHT SHIFT WORKERS CORRELATED WITH SLEEP QUALITY AND TIME TO RECOVERY Sugiono, Sugiono; Yuenyongchaiwat, Kornanong; Azlia, Wifqi; Lukodono, Rio Prasetyo; Putro, Wisnu Wijayanto; Sari, Sylvie Indah Kartika; Indrayadi, Bambang
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.5

Abstract

The worker’s recovery time from physical and mental workload is a crucial factor for office and factory management and it will effect on the working performance and design working system. The aim of this paper is to investigate the impact of physiological conditions on sleep quality and time to recovery for night shift electric steam power plant workers. The research is started with study literatures on physiology ergonomics, sleep quality measurement, human metabolism, expenditure energy graph and physical/mental workload. The research worked with 50 samples (age between 30 to 45 years old) who have duty to control the electric steam power plant on dynamic computer screen in the night shift. The Pittsburgh Sleep Quality Index (PSQI) questionnaire was used subjectively to measure the value of sleep quality on 19 self – rated questions that assessed various sleep quality – related factor over the previous month. To know the speed of Time to Recovery (TTR), every worker perform a treadmill load with constant speed of 5 Km/hour for 10 minutes. Heart rate changes before activity, during activity (treatment) and TTR are recorded and it be analysed the pattern of relationship conducting to PSQI score. According to the data analysis, the higher PSQI score the longer time consume by workers to recovery. Moreover, Pearson statistic test results found that there is a strong relationship between sleep quality (PSQI value) and TTR for workers with value of 0.853. In sort, improving the quality of sleep for night shift electric steam power plant workers can definitely improve work performance on a shorter rest time or healthier conditions of workers.
TEA PACKAGING DESIGN USING INTEGRATION OF KANSEI ENGINEERING AND EYE TRACKING FOR ENHANCING CONSUMER APPEAL Cahyawati, Amanda Nur; Fathimahhayati, Lina Dianati; Tontowi, Alva Edy
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 12 No. 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to determine the design specifications for tea drink packaging that appeal to consumers using Kansei and eye-tracking techniques. Kansei Engineering focuses on developing products that align with consumers' feelings and emotional needs. Eye-tracking provides insights into how consumers see and interact with packaging, as evidenced by total fixation duration, allowing for the identification of design elements that attract the most attention and influence consumer perception. The application of eye-tracking and Kansei Engineering helps match customer perceptions of products with their functional and technical specifications, providing a holistic and effective approach to increasing sales and consumer satisfaction. Integrating these two methods makes the design process more consumer-focused, combining emotional and visual appeal, thereby increasing attractiveness and potential consumption. The urgency of this research lies in its potential to revitalize the tea industry in Indonesia by utilizing innovative packaging designs. Enhancing consumer appeal to tea products through the integration of Kansei Engineering and eye-tracking, which are visually and emotionally engaging, addresses the main obstacle to low tea consumption in Indonesia. Thus, it contributes to the growth of the tea market and promotes healthier beverage choices among Indonesian consumers. The research results show that an aesthetic packaging design requires a sports cap type lid, a convex bottle body, a plain motif, and a square cross-section. Ergonomic packaging design requires a flip cap type lid, a wave-shaped bottle body, a textured motif, and a round cross-section. Simple packaging design requires a straw cap type lid, a serrated bottle body, a plain motif, and a square cross-section. This research aims to revitalize Indonesia's tea industry through consumer-oriented packaging design, increasing emotional and visual appeal. Key implications include increased consumer appeal, potential for increased consumption, better marketing strategies, and packaging design innovation that resonates emotionally with consumers.
IMPROVING THE LOGIN AND NEWS FEATURES WITH FINGERPRINT AND CARD LAYOUT: AN EVALUATION OF CONVERSION RATE AND USABILITY Yogastama, Reyhan Ardiya; Kharisma, Agi Putra; Santoso, Nurudin
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 12 No. 2 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The discipline of human factors or also known as ergonomics focuses on interactions between humans and artifacts. One example of such an artifact is a smartphone. Currently, many smartphones are equipped with various sensors, one example is the fingerprint sensor. Fingerprint sensors offer various conveniences, an example of their use is to simplify the login process. This research uses the Gapura UB application as a case study. Currently the Gapura UB application does not yet implement fingerprint login, so it is not yet known whether Gapura UB users will prefer to log in using the conventional method (email and password) or using a fingerprint. Apart from that, this research also investigated the usability of news features of Gapura UB when implementing a card layout (as a treatment) compared to the original version which uses a list layout (as a control). To answer these research problems, this research uses an experimentation with the research subjects from the students of Teknik Informatika, FILKOM UB and the research objects are conversion rate and usability. The conversion rate measurement involved 30 unmoderated participants, whereas the usability measurement involved 10 moderated within group participants. The results obtained on the fingerprint login conversion rate show that most participants prefer to use fingerprint login (73% ± 17%) rather than conventional login methods. Meanwhile, the results of the usability test on the news feature using the card layout showed that there was an increase in retention time (51 ± 15 seconds) compared to the original version which used the list layout (31 ± 14 seconds). The score of measurements using the system usability scale also show an increase in the card layout (90 ± 5) compared to the list layout (65 ± 15).
TAGUCHI EXPERIMENTAL DESIGN FOR ROASTING PARAMETER TO IMPROVE COFFEE POWDER QUALITY Putro, Wisnu Wijayanto; Oktavianty, Oke; Novareza, Oyong; Swara, Suluh Elman; Rachmansyah, Ihram; Ningrum, Nur Afia Tri
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 12 No. 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Quality improvement is important to reach customer satisfaction and gain the competitive advantage. This research was using the Taguchi experiment design to obtain a combination of roasting parameters, which could in turn improve the quality of coffee powder. During the roasting process, the acids that were naturally contained in coffee beans were transformed into acetic acid, malic acid, citric acid, and phosphoric acid, which in turn contributed to the coffee’s actual taste. Several key factors contributed to the taste of coffee powders, namely roasting temperature, roasting time, the weight per roasting, and cooling time. The significance factor to improve quality of Robusta coffee powder namely roasting temperature on 185 °C, roasting time in 20 minutes, weight per roasting is 7.5 kilograms and cooling time is 10 minutes. The organoleptic tests of the resulting coffee powders showed an average of 4.93 with regards to consumer rating. The experiment result revealed the optimal setting level that should be applied in the production process of coffee powders for gaining better quality and thus more favourable to consumers.

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