MATHEMATICAL MODELS FOR BUFFER SIZING PROBLEMS IN PARALLEL ASSEMBLY LINES WITH MULTI-LINE STATIONS AND DIFFERENT CYCLE TIMES

10.6036/10223 ◽  
2021 ◽  
Vol 96 (6) ◽  
pp. 563-563
Author(s):  
HARRY AGUILAR GAMARRA ◽  
ALBERTO GARCIA VILLORIA ◽  
RAFAEL PASTOR MORENO
Keyword(s):  
Mathematical Models ◽  
Assembly Line ◽  
Production Systems ◽  
Assembly Lines ◽  
Cycle Times ◽  
Buffer Sizing ◽  
Parallel Assembly

In industry there are production systems consisting of more than one assembly line. If these are close together, it is possible for an operator to perform tasks from two adjacent lines assigned to his station (this will be a "multi-line station")

scholarly journals EXISTENCE AND SIZING OF BUFFERS IN PARALLEL ASSEMBLY LINES WITH MULTI-LINE WORKSTATIONS AND DIFFERENT CYCLE TIMES

2021 ◽  
Vol 9 (1) ◽  
pp. [10 p.]-[10 p.]
Author(s):  
RAFAEL PASTOR MORENO ◽  
HARRY AGUILAR GAMARRA ◽  
ALBERTO GARCIA VILLORIA
Keyword(s):  
Programming Model ◽  
Mixed Integer ◽  
Buffer Size ◽  
Assembly Lines ◽  
Cycle Times ◽  
Task Sequencing ◽  
Buffer Sizing ◽  
Sequencing And Scheduling ◽  
Parallel Assembly ◽  
First Time

ABSTRACT: Parallel Assembly Lines with multi-line stations (PALBs) have been widely studied in recent years because PALBs can help improve the efficiency of a production system. However, the need of buffers has not been considered in the PALBP literature. In this study, for the first time in the literature, it is shown and demonstrated the need to consider the use of buffers in this type of line when their cycle times are different. Moreover, the buffer sizing problem in a multi-line workstation is presented and formalized. It is shown that the sequencing and scheduling of the task influences the buffer size. Finally, the designed resolution method is shown: solve a mixed integer linear programming model with a commercial software, with the objective of minimizing the size of the buffers. Keywords: Parallel assembly lines balancing, buffer sizing, task sequencing and scheduling.

Assembly Line Balancing with Resource Dependent Task Times: An Application to Parallel Assembly Lines

2013 ◽  
Vol 46 (9) ◽  
pp. 845-850 ◽  
Author(s):  
Yakup Kara ◽  
Yakup Atasagun
Keyword(s):  
Assembly Line ◽  
Assembly Line Balancing ◽  
Line Balancing ◽  
Assembly Lines ◽  
Parallel Assembly

Influence of Production Flow Management Methods on an Assembly Line Supplied on Stock

2014 ◽  
Vol 657 ◽  
pp. 971-975 ◽  
Author(s):  
Ana Rotaru ◽  
Alin Gavriluţă ◽  
Eduard Niţu
Keyword(s):  
Performance Indicators ◽  
Assembly Line ◽  
Production Systems ◽  
Assembly Lines ◽  
Production Flow ◽  
Experimental Conditions ◽  
Work In Process ◽  
Average Work ◽  
Method Of Production ◽  
Process Managers

The present paper is a continuation of a larger study of the authors, which consists of an analysis on the performances of several production systems. In this paper it is analyzed the influences of the method of managing the flows, the method of production programing and the clients demand on performance indicators of a multiproduct assembly line supplied on stock. The assembly line is designed to produce two types of similar products and is made of 5 workstations with mainly manual activities, which are supplied with parts on a stock based method. The performance indicators chosen for analysis were: average work in process, cost per unit, systems reactivity to client demand and throughput. The values of these indicators were obtained by simulating the assembly lines functioning in different experimental conditions, determined of the variation of above mentioned variables, by using ARENA software. The obtained results were interpreted and structured, in a manner to help the process managers to take adequate decisions considering the wanted objectives.

scholarly journals Application of Digitization Procedures of Production in Practice

2019 ◽  
Vol 27 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Erika Sujová ◽  
Helena Čierna ◽  
Iwona Żabińska
Keyword(s):  
Industry 4.0 ◽  
Assembly Line ◽  
Statistical Data ◽  
Production Systems ◽  
Simulation Software ◽  
Assembly Lines ◽  
The Real ◽  
Digital Twin ◽  
Production Processes ◽  
Digital Engineering

AbstractThe paper addresses application of digitazation of production processes, which is part of organizational digitization, also known as Industry 4.0. It deals with modernization and optimization of production systems by creating models in simulation software via digital engineering. For our analysis, 8 real assembly lines were used, with an average of 15 workplaces, which were integrated into one universal line by means of simulation. The aim of our research was to create a digital twin of the real assambly lien and to analyse effectiveness of the proposed modernization universal assembly line using the generated statistical data.

scholarly journals Using noisy RFID for accurately monitoring the assembly line of panel fabrication

2017 ◽  
Author(s):  
Y. Wen ◽  
D. Ogunyemi ◽  
A. S. Bouferguene ◽  
M. S. Altaf ◽  
A. Bouferguene ◽  
...  
Keyword(s):  
Automotive Industry ◽  
Assembly Line ◽  
Production Systems ◽  
Waiting Times ◽  
Commercial Buildings ◽  
Project Delivery ◽  
Assembly Lines ◽  
Serial Production ◽  
Intermediate Products ◽  
The Past

Over the past few years, the interest towards off-site construction as part of project delivery for residential and commercial buildings has increased dramatically. In this regard, buildings are decomposed into panels that are manufactured using assembly lines smilar to what was developped to the automotive industry. However, because these serial production systems do not have buffers that could store intermediate products when a bottleneck occurs downstream, it often happens that these products are required to wait at the current workstation before production can resume. In this contribution, we develop algorithms allowing the waiting times to be extracted from timestamps that are collected from an RFID system reading the tags on panels as they enter each workstation.

Functional Modeling of an Assembly Line Supplied in Synchronous

2013 ◽  
Vol 371 ◽  
pp. 116-120 ◽  
Author(s):  
Ana Rotaru ◽  
Alin Constantin Gavriluţă ◽  
Eduard Niţu
Keyword(s):  
Assembly Line ◽  
Production Systems ◽  
Functional Model ◽  
Modeling Method ◽  
Product Line ◽  
Functional Modeling ◽  
Assembly Lines

The present paper is part of a broader study of the authors, consisting of modeling and simulating several production systems. Functional modeling of a workstation supplied by various methods was carried out and presented in the paper [. This paper presents the functional modeling of an assembly line composed of 4 workstations with manual activities, designed to make 4 types of products (multi-product line). The supply with parts of the line is made with kitting system. The novelty of this study is the use of IDEF0 functional modeling method to describe the functioning of the assembly line in which the supply method is synchronous. The functional model developed had allowed to identify and to design the kitting and picking circuits, as for the highlighting of the traces followed by the components to the workstations, depending on their type of supply. This model can be extended and used to other assembly lines supplied in synchronous.

scholarly journals Mathematical models and migrating birds optimization for robotic U-shaped assembly line balancing problem

2019 ◽  
Vol 31 (12) ◽  
pp. 9095-9111 ◽  
Author(s):  
Zixiang Li ◽  
Mukund Nilakantan Janardhanan ◽  
Amira S. Ashour ◽  
Nilanjan Dey
Keyword(s):  
Mathematical Models ◽  
Assembly Line ◽  
Assembly Line Balancing ◽  
Line Balancing ◽  
Migrating Birds Optimization ◽  
Assembly Line Balancing Problem ◽  
Migrating Birds

Research and Design of SWET Equipment for Engineering Machinery Company

2014 ◽  
Vol 971-973 ◽  
pp. 646-649
Author(s):  
Qing Song Zhao
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Work Environment ◽  
Simulation Training ◽  
Assembly Line ◽  
Training System ◽  
Assembly Lines ◽  
Structural Framework ◽  
Research And Design ◽  
Disassembly Line

The structural framework for the car’s assembly line simulation training system of the SWET(Simulated Work Environment Training) is designed overall, including two automatic car assembly lines and two manually run the disassembly line. The automatic control system of the car’s assembly line simulation training system is designed with the knowledge of electrical and electronic, SCM principles, counts the number of the car, automatically pause and open the line with alarm and automatic recovery control.

Variation Analysis for Compliant Assembly

2000 ◽  
Author(s):  
S. Jack Hu ◽  
Yufeng Long ◽  
Jaime Camelio
Keyword(s):  
Sheet Metal ◽  
Assembly Line ◽  
Assembly Process ◽  
Variation Analysis ◽  
Assembly Lines ◽  
Compliant Assembly ◽  
Single Station ◽  
Dimensional Variation ◽  
Sheet Metal Assembly

Abstract Assembly processes for compliant non-rigid parts are widely used in manufacturing automobiles, furniture, and electronic appliances. One of the major issues in the sheet metal assembly process is to control the dimensional variation of assemblies throughout the assembly line. This paper provides an overview of the recent development in variation analysis for compliant assembly. First, the unique characteristics of compliant assemblies are discussed. Then, various approaches to variation modeling for compliant assemblies are presented for single station and multi-station assembly lines. Finally, examples are given to demonstrate the applications of compliant assembly variation models.

scholarly journals Bucket Brigades to Increase Productivity in a Luxury Assembly Line

10.5772/56837 ◽  
2013 ◽  
Vol 5 ◽  
pp. 28 ◽  
Author(s):  
Filippo De Carlo ◽  
Orlando Borgia ◽  
Mario Tucci
Keyword(s):  
Assembly Line ◽  
Assembly Line Balancing ◽  
Assembly Lines ◽  
Manual Assembly ◽  
Increase Productivity ◽  
Assembly Line Balancing Problem ◽  
High Level ◽  
Simple Assembly ◽  
A Company ◽  
Bucket Brigades

One of the most challenging issues in manual assembly lines is to achieve the best balance of workloads. There are many analytic approaches to solve this problem, but they are often neglected, since they are time-consuming and require high level engineering skills. Fashion bags packaging lines must comply with a number of different products with low production volumes, while the organization of the line is often under the mere responsibility of the foreman, who balances workloads in an empirical way. The aim of this work is to evaluate the effectiveness of the arrangement of bucket brigades (BBs) for an assembly line of luxury handbags. To do this, it was decided to perform a testing activity in a company producing fashion handbags in order to compare the self-made design with the BBs and with a simple assembly line balancing problem algorithm. The originality of this research lies in the fact that there are no studies in the literature on BBs applied to the packaging of highly variable small batches. The results were excellent, showing the advantages of BBs in terms of flexibility, the reduction of work in the process and the ability to handle small anomalies.

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