Researching and Applying the Line Balancing Methods in Optimizing Automobile Assembly Lines

2019 ◽  
Vol 889 ◽  
pp. 574-579
Author(s):  
Nguyen Phi Trung ◽  
Le Minh Tai

The purpose of this paper is to researching basic methods of line balancing used widely in operations. Particularly, five basic methods including Longest task time, Shortest task time, Most following tasks, Least following task, Ranked positional weighted are researched. Then they are applied in balancing the assembly line of an automobile manufacturing company. The results show the comparisons of advantages and disadvantages of each method based on total idle time and efficiency index. Firstly, idle time is the waiting time or non-working time of the workers while they are still paid their enough salary. Moreover, the waiting time makes an unfair between workers - some people work more and some work less. Secondly, efficiency in the workplace is the time it takes to do something. Efficient employees and managers complete tasks in the least amount of time possible with the least amount of resources possible by utilizing certain time-saving strategies. The calculations are performed to create these two values and graphs are drawn with the support of excel softwares.

2018 ◽  
Vol 38 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Xiaofeng Hu ◽  
Chunaxun Wu

Purpose The purpose of this paper is to define new criteria for measuring workload smoothness of two-sided assembly lines and propose an algorithm to solve a two-sided assembly line balancing problem focusing on distributing the idle time and the workload as evenly as possible among the workstations. Design/methodology/approach This paper points out that the mean absolute deviation (MAD) and the smoothness index (SI) used to measure the workload smoothing in one-sided assembly lines are both inappropriate to evaluate the workload balance among workstations in two-sided assembly lines, as the idle time occur at the beginning and in the middle of a cycle within workstations. Then, the finish-time-based SI and MAD (FSI and FMAD) are defined, and a heuristic procedure based on the core mechanism of Moodie and Young method is proposed to smooth the assembly workload in two-sided assembly lines. Findings The computational results indicate that the proposed heuristic algorithm combined with the FMAD is effective in distributing the idle time and the workload among workstations as evenly as possible in two-sided assembly lines. Practical implications The two-sided assembly line balancing problem with the objective of the line efficiency can be effectively solved by the proposed approach. Originality/value The FMAD is proposed to effectively improve the workload smoothing in two-sided assembly lines.


2012 ◽  
Vol 9 (1) ◽  
pp. 33-45
Author(s):  
Siti Aisyah ◽  
Mediana Mediana

Smooth production in a manufacturing firm is very important because it will affect the outcome of which is the expected output of the production trajectory balance that existed at the company if it is optimal or not. The objectives to be achieved in this research is balancing production trajectory so that the expected target company can be reached, drink idle time, and improve the efficiency of the production trajectory.  At PT METBELOSA there are trajectories that have not been balanced by the production of idle time on the final line for assembling OB91Z 1.606149 minutes, balance delay in assembling the final line OB91Z by 29.75% and the efficiency in assembling the final line OB91Z of 70.25%, from Data collection on the final assembling line OB91Z also note that the company can not achieve the expected production targets every day as many as 1500 kwh meter OB91Z type. Therefore the company needs to make improvements in the balancing path to reach their intended target in the final assembling line OB91Z. The method used is a heuristic method MALB (Mansoor Aided Line Balancing) and heuristic methods COMSOAL (Computer Method for Sequencing Operations for Assembly Lines). The data used is data on the production process of assembling the final line OB91Z and the amount of labor in assembling the final line OB91Z. After making improvements by using heuristic methods MALB (Mansoor Aided Line Balancing) then the balance delay becomes 14.62% and 85.38% effeciency be.


Author(s):  
Konstantinos N. Genikomsakis ◽  
◽  
Vassilios D. Tourassis

The process of optimally assigning the timed tasks required to assemble a product to an ordered sequence of workstations is known as the Assembly Line Balancing (ALB) problem. Typical approaches to ALB assume a strict mathematical posture and mostly treat it as a combinatorial optimization problem with the objective of minimizing the idle time across the workstations, while satisfying precedence constraints. The actual nature of the tasks assigned is seldom taken into consideration. While this approach may yield satisfactory cycle time results on paper, it often leads to inconvenient task assignments in an actual work environment. It has been postulated in the literature that assigning groups of related tasks to the same workstation may lead to assembly lines that exhibit increased robustness in real-world situations at the expense of a slightly increased cycle time. The prototypical example of such an approach, Agrawal’s Largest Set Rule (LSR), utilizes backward work relatedness to assign a set of cohesive tasks to the proper workstation. In this paper, we enhance the performance of the original LSR algorithm through the concept of bi-directional work relatedness, where backward and forward relationships are taken into consideration for task assignments. The proposed concept leads to comparable cycle time and improved work relatedness. Applying this novel concept to a benchmark ALB problem demonstrates the feasibility and applicability of the proposed approach.


2011 ◽  
Vol 383-390 ◽  
pp. 4620-4628
Author(s):  
Olga Ioana Amariei ◽  
Codruţa Oana Hamat ◽  
Liviu Coman ◽  
Cristian Fănică ◽  
Cristian Rudolf

Balancing a production line means to organize the activity of the human operators, to establish the production flux and designing the line, minimizing the idle time for the machines and the operators, through an optimal charge bestowed upon them. WinQSB software offers three methods of solving this type of problem, namely: heuristic techniques (a basic method is specified and an alternative one from all the available ones), Optimizing Best Bud Search and Computer Method of Sequencing Operations for Assembly Lines, presented all in the present paper.


1981 ◽  
Vol 11 (1) ◽  
pp. 99-104 ◽  
Author(s):  
C. H. Meng

The purpose of this study is to develop analytical formulae for special queuing situations which occur during the operations of the felling and processing devices of a tree harvester, and the pickup and processing devices of a tree processor. Analytical formulae are used to estimate mean waiting time and mean idle time; in case 1 both "input" times and processing times are normally distributed; in case 2 "input" times are normally distributed and processing times are Poisson distributed. "Input" time is a term used for convenience to denote time required to fell a tree by a harvester or time required to pick up a tree by a processor. Methods of choosing distributions for representing "input" times and processing times are provided. In addition, there are two examples, using historical data, which demonstrate the applications of the analytical formulae.


2016 ◽  
Vol 15 (2) ◽  
pp. 182
Author(s):  
SAIFUL .. ◽  
MULYADI HAMBALI ◽  
TRI MUHADI RAHMAN

PT XYZ merupakan salah satu perusahaan yang bergerak di bidang industri mebel. Masalah yang dihadapi perusahaan adalah adanya ketidakseimbangan di lintasan produksi akibat ketidakmerataan pembagian beban kerja di setiap stasiun kerja. Hal ini menyebabkan performansi keseimbangan lintasan (line performance) menjadi kurang baik. Untuk menyelesaikan permasalahan ini perlu dilakukan penyeimbangan lintasan produksi. Hal ini dapat dilakukan dengan metode line balancing yaitu metode penugasan sejumlah pekerjaan yang saling berkaitan dalam satu lintasan produksi sehingga setiap stasiun kerja memiliki waktu yang tidak melebihi waktu siklus dari stasiun kerja tersebut. Metode line balancing yang digunakan adalah metode heuristik yang terdiri dari: metode bobot posisi (Ranked Positional Weight), metode pembebanan berurut (Large Candidate Rule), dan metode pendekatan wilayah (Region Approach). Dari ketiga metode Heuristik yang digunakan sebagai solusi penyeimbangan lintasan, terjadi perbaikan performansi dengan nilai yang sama pada lintasan produksi. Nilai efisiensi lintasan (line efficiency) meningkat menjadi 94,07 % dari 62,71 % pada kondisi awal. Nilai keseimbangan waktu senggang (balance delay) turun menjadi 5,92 % dari 37,28 % pada kondisi awal. Waktu menganggur (idle time) turun menjadi 12,39 menit dari 116,87 menit pada kondisi awal. Nilai smoothness index juga turun menjadi 7,44 dari 64,67 pada kondisi awal. PT XYZ is one of the company which refers to furniture industries sector. The problem which faced by this company is unbalance of the production line which is caused by the unequal of work responsibility distribution in each work station. This problem caused the performance of line balance doesn’t work properly. To solve this problem we need to do the line balancing of production line. It can be done by line balancing methode that assigns a number of work which is related in one production line until each work station has efficient time which is not more than the cycle time of the work station. Line balancing methode that used is heuristic methode which is devided into ranked positional weight methode, large candidate rule methode, and region approach methode. From those three heuristic methode that used as solution of line balancing, there was improvement happenned with the same value in doors of production line. Line efficiency increased into 94,07% from 62,71% at the beginning condition. Balance delay increased into 5,92% from 37,28% at the beginning condition. The idle time descreased into 12,39 minutes from 116,87 minutes at the beginning condition. The smoothness index descreased into 7,44 from 64,67 at the beginning condition.


2020 ◽  
Vol 3 (1) ◽  
pp. 27-40
Author(s):  
Pria Tubagus ◽  
Saharuddin Kaseng ◽  
Asngadi Asngadi

Basically, the purpose of production management is directed to create production efficiency and effectiveness to improve the results and contribute to the maximum profit achievement of the company. One of the problems in production management that influences the efficiency and effectiveness of production is layout arrangement of production facilities. This research is conducted through direct observation in Banana Chips Company ‘Cahaya Indi’ located in Donggala District. The type of research is quantitative using line balancing method and travel chart. The result of the line balancing method shows the efficiency of banana chips production process is 90,73% with idle time of 9,27%. While the result of travel chart method indicates a new layout design of banana chips production facility at Cahaya Indi is more effective with material flow load of 198,83 from the initial layout of 259,93. Pada dasarnya, tujuan manajemen produksi selalu diarahkan pada terciptanya efisiensi dan efektifitas produksi, agar dapat meningkatkan hasil produksi serta memberikan konstribusi yang maksimal terhadap laba perusahaan. Salah satu permasalahan manajemen produksi yang berpengaruh terhadap efisiensi dan efektifitas produksi adalah pengaturan tata letak (layout) fasilitas produksi. Penelitian ini dilakukan dengan cara observasi langsung pada Cahaya Indi yang bertempat di Kabupaten Donggala. Jenis penelitian yang diguanakan adalah penelitian kuantitatif dengan menggunakan metode line balancing dan travel chart. Hasil penelitian dengan menggunakan metode line balancing diperoleh efisiensi dari proses produksi kripik pisang sebesar 90,73% dengan waktu menganggur 9,27%. Sedangkan hasil dari metode travel chart diperoleh rancangan baru tata letak fasilitas produksi kripik pisang pada Cahaya Indi yang lebih efektif sebesar 198,83 beban aliran bahan dari tata letak mula-mula sebesar 259,93 beban aliran bahan.


2017 ◽  
Vol 25 (0) ◽  
pp. 119-126 ◽  
Author(s):  
Mahmut Kayar ◽  
Öykü Ceren Bulur

This study primarily includes theoretical information on the performance and lost productive time of a firm. Furthermore t-shirt sewing operations of a garment firm were analysed and time measurement for each operation was carried out by the time keeping method. By considering the measurements obtained, different performance estimations, the firm’s lost productive time rates, and the standard time was calculated within 5 different scenarios. According to each sewing standard time obtained, the assembly line balancing practice was carried out using the Hoffman method. Later on results of the assembly line balancing were compared, and the importance of employee performance assessment and its lost productive time rates for firms were discussed. The aim of the study was to emphasize the value of impeccable determination of the employee performance assessment and lost productive time rates. Consequently garment firms will be more cautious in calculating the standard time and will be able to reach their production target within the accurate measurement they obtain.


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