A goal programming mixed-model line balancing for processing time and physical workload

Choi, Gyunghyun

doi:10.1016/j.cie.2009.01.001

Cited by 51 publications

(16 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The phsyical workload is considered by certain studies as an additional restraint for the pursuit of assembly lines that are well-designed. Choi (2009) presented a model of integer program that incorporates excessive work load of processing duration and physical work load including several risk factors. In order to solve it, the target programming approach and a suitable algorithm process techniques were used.…”

Section: Literature Reviewmentioning

confidence: 99%

Ergonomi̇k Montaj Hatti Dengeleme İçi̇n Yeni̇ Bi̇r Model Öneri̇si̇

Kahya¹,

Şahin²

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

View full text Add to dashboard Cite

Assembly line balancing is a problem where tasks assign to stations in compliance with precedence constraints and as far as possible to balance delays. Assembly lines which is not designed properly in an ergonomic way cause not only productivity loss but also work-related muscoloskeletal disorders on workers. To prevent such problems, it should be aimed to catch acceptable level for each workstation's risk score and assign ergonomic risks equivalently among workers. In this study, for assembly line balancing problem, a new model approach is tackled, which constitute stations by consider ergonomic risk scores in addition to cycle time and precedence constraints. In order to compare proposed model with a classical assembly line balancing technique, a performance criterion which is combination of cycle time and ergonomic risk score were defined. The developed model was applied in a factory's oven assembly line. In the assembly line, task times were measured, precedence diagram was constructed and ergonomic risk levels were evaulated by using REBA method. When balancing lines with using Longest Operation Times technique, performance score was %25.61 but when it comes to balance with developed model performance score was obtained %18.25. It has been detected that developed model provides 7.41% improvement in line's total performance.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Ergonomi̇k Montaj Hatti Dengeleme İçi̇n Yeni̇ Bi̇r Model Öneri̇si̇

Kahya¹,

Şahin²

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

View full text Add to dashboard Cite

show abstract

“…Beberapa penelitian lainnya, seperti yang dilakukan oleh Marian, dkk. (2006), Choi (2009), Xu, dkk. (2011), Otto dan Scholl (2011, serta Boenzi, dkk.…”

Section: Pendahuluanunclassified

Penjadwalan Waktu Istirahat Optimal Untuk Mengurangi Risiko Musculoskeletal Disorders Berdasarkan OCRA Index

Andriani¹,

Sugiono

2017

JITI

View full text Add to dashboard Cite

Repetitive tasks carried out by workers of packaging department of mineral water company led to some complaints of pain and fatigue on a particular body part of the workers, especially on their upper body part. This study aims to determine risk level of musculoskeletal disorders with OCRA index and provides optimal break schedule to reduce the risk level. Based on calculations using the OCRA index method, it is found that risk of injury to the workers were medium with high level of risk. Despite small workload of the operators, this may be caused by poor distribution of rest periods and lengthy working time for highly repetitive tasks. Improvement proposed in this study is type of work-compliant break time allocation. Optimal scheduling of which main objective is optimal break time is eventually obtained by applying enumeration algorithm with integer linear programming model. Based on OCRA index after improvement, it is clear that the proposal decreases the risk level of the workers.Abstrak. Pekerjaan repetitif yang dilakukan oleh pekerja pada bagian packaging di perusahaan air mineral memunculkan beberapa keluhan sakit dan kelelahan pada bagian tubuh tertentu, terutama pada bagian atas tubuh. Artikel ini membahas level risiko muscoloskeletal disorders dengan OCRA indexdan memberikan penjadwalan waktu istirahat yang optimal untuk mengurangi level risiko tersebut.Risiko cidera operator bagian packaging adalah sedang dan tinggi yang disebabkan masih buruknya distribusi waktu istirahat yang belum sesuai dan waktu bekerja yang terlalu lama untuk jenis pekerjaan yang mempunyai sifat repetitif yang sangat tinggi, meskipun beban kerjanya kecil. Usulan perbaikannya adalah alokasi waktu istirahat sesuai dengan jenis pekerjaan. Penjadwalan yang optimal dilakukan dengan enumerative algorithm melalui model integer linear programming yang mampu memberikan jadwal istirahat yang optimal. Hasil perhitungan nilai OCRA index usulan diketahui menurunkan nilai level risiko untuk operator dibandingkan nilai level risiko sebelumnya.

show abstract

“…Few researches jointly consider physical demands and completion time of tasks in assignment problems, and solve them using heuristic methods (Carnahan et al, 2000a(Carnahan et al, , 2000bChoi, 2009;Otto and Scholl, 2011). The integration of ergonomic aspects, as well as worker's skills, within traditional production oriented management tools will be crucial for future research (Battaia and Dolgui, 2013).…”

Section: Ergonomic Job Rotation Schedulingmentioning

confidence: 99%