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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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TAGUCHI EXPERIMENTAL DESIGN FOR ROASTING PARAMETER TO IMPROVE COFFEE POWDER QUALITY Putro, Wisnu Wijayanto; Oktavianty, Oke; Novareza, Oyong; Swara, Suluh Elman; Rachmansyah, Ihram
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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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.
OPTIMIZING EVACUATION ROUTES IN INDONESIAN URBAN SETTINGS WITH RESIDENTIAL AND SMALL INDUSTRIAL ZONES USING PATHFINDER SIMULATION Hardiningtyas, Dewi; Tama, Ishardita Pambudi; Sholihah, Qomariyatus
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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Abstract

The rapid urbanization in Indonesia has resulted in increased complexity within its urban settings, particularly in areas combining residential and small industrial zones. Effective evacuation planning is crucial to ensure the safety of inhabitants during emergencies. This study explores the optimization of evacuation routes in such mixed-use urban areas using Pathfinder simulation software. Two scenarios were examined: one with two assembly points and another with three assembly points. The simulations were conducted in a densely populated area in Malang City, Indonesia known for its combination of residential and small industrial units. The results indicate that the scenario with three assembly points significantly enhances evacuation efficiency compared to the two-assembly point scenario. Specifically, the three-assembly point configuration reduced overall evacuation times and minimized congestion at critical junctures, allowing for smoother and faster evacuation flows. The findings underscore the importance of strategically placing assembly points to improve the distribution of evacuees and reduce potential bottlenecks. This study contributes to the body of knowledge on urban evacuation planning in mixed-use settings and provides practical insights for urban planners and emergency management authorities in Indonesia. The use of advanced simulation tools like Pathfinder offers a valuable approach to optimize evacuation strategies, ensuring better preparedness and response in the face of urban emergencies.
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.
KANSEI ENGINEERING AND EYE TRACKING IN TEA PACKAGING DESIGN 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

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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.
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.
UNDERSTANDING COGNITIVE LOAD IN HUMAN-MACHINE INTERACTIONS AT MRT TICKET VENDING MACHINES: A NASA TLX EVALUATION Sugiono, Sugiono; Lukodono, Rio Prasetyo; Sudjono, Harry
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 2 (2024): (in process)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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Abstract

The provision of Mass Rapid Transit (MRT) and its supporting facilities in Jakarta necessitates an analysis of their user-friendliness for passengers. These facilities include information on various locations such as toilets, mosques, MRT card counters, ticket vending machines (TVMs), and signage directing passengers to the MRT. TVMs are machines that enable passengers to purchase MRT tickets and top up their card balances. A crucial aspect of evaluating TVM performance is assessing their user-friendliness, which is determined by the ease with which passengers can understand and operate them. This study aims to analyze the user-friendliness of TVMs at MRT stations using the NASA TLX approach. NASA TLX evaluates the impact of using TVMs based on mental, physical, and temporal demands, as well as performance, effort, and frustration. Data were collected through accidental sampling of respondents aged 18–28 years. The NASA TLX questionnaire explored users' cognitive perceptions of the TVMs' displays and procedures. The results will reveal how the factors measured by NASA TLX influence the interaction between passengers and TVMs at MRT stations. The findings will provide recommendations for MRT managers to enhance TVM designs and modify display procedures to improve user satisfaction.
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.
A MODIFICATION OF TIBREWALA, PHILIPPE, AND BROWNE'S ALGORITHM FOR MULTI-SHIFT MANUFACTURING WORKERS SCHEDULING Wahyudi, Adhie Tri; Zendrato, Rosleini Ria Putri; Indrasari, Anita; Suparti, Erni; Prayuda, Fendi; Cahyawati, Amanda Nur
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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Abstract

The SME under study, which specializes in hard wooden and leather furniture for foreign markets, encountered difficulties in integrating their make-to-order production system with tight shipping export deadlines. This necessitated a systematic worker scheduling technique in order to satisfy production targets and reduce labor expenditures. The aim of this research was to design a worker scheduling system to ensure that the production makespan corresponded to the available time limitations. The study found that the Tibrewala, Philippe, and Browne algorithm for multi-shift workers scheduling significantly reduced labor costs while ensuring order fulfillment within predefined constraints, emphasizing the need for additional research that includes all production cost variables for more comprehensive cost savings.
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.
EVALUATION OF THE APPLICATION OF GOOD MANUFACTURING PRACTICE AND SANITATION STANDARD OPERATING PROCEDURES IN PRODUCTION PROCESS Candrianto, Candrianto; Mouludi, Isra; Sipahutar, Erwinsyah
JEMIS (Journal of Engineering & Management in Industrial System) Vol 12, No 2 (2024): (in process)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

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Abstract

This study aims to evaluate the application of the basic requirements of food safety standard, namely GMP and SSOP during the production process. The observations method for data collection in this study was through interviews of workers and owners. Evaluate of GMP and SSOP was carried out to see the effectiveness of conformity and non-conformity measures in carrying out the production process. The results of this study stated that the conformity assessment of the evaluation of the application of GMP and SSOP obtained a value of 42.50%-84.00%, with a deviation value of 185 from the overall value of 528 which means deviations in the moderate level so that the application of the GMP is said to be less in accordance with the provisions of the Regulation of the Minister of Industry No. 75 of 2010. The conformity assessment of the application of the SSOP obtained a value between 20.00%-84.00%, with a deviation value of 45 from the overall value of 160 which means that the deviation is in a moderate level or does not meet the FDA's provisions regarding SSOP as stated by government regulation, Number 28 of 2004 concerning food safety, quality, and nutrition. The high rate of deviations in the application of GMP and SSOP indicates a low level of contamination prevention during the production process. 

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