Balancing of simple assembly lines under variations of task processing times

2012 ◽  
Vol 201 (1) ◽  
pp. 265-286 ◽  
Author(s):  
Evgeny Gurevsky ◽  
Olga Battaïa ◽  
Alexandre Dolgui
Keyword(s):  
Assembly Lines ◽  
Processing Times ◽  
Task Processing ◽  
Simple Assembly

Balancing assembly lines operating with heterogeneous workers under uncertainty in task processing times

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Paraskevi Th. Zacharia ◽  
Andreas C. Nearchou
Keyword(s):  
Design Methodology ◽  
Assembly Line ◽  
Test Problems ◽  
Assembly Lines ◽  
Worker Assignment ◽  
Content Type ◽  
Processing Times ◽  
Smoothness Index ◽  
Task Processing

PurposeThis paper considers the assembly line worker assignment and balancing problem of type-2 (ALWABP-2) with fuzzy task times. This problem is an extension of the (simple) SALBP-2 in which task times are worker-dependent and concurrently uncertain. Two criteria are simultaneously considered for minimization, namely, fuzzy cycle time and fuzzy smoothness index.Design/methodology/approachFirst, we show how fuzzy concepts can be used for managing uncertain task times. Then, we present a multiobjective genetic algorithm (MOGA) to solve the problem. MOGA is devoted to the search for Pareto-optimal solutions. For facilitating effective trade-off decision-making, two different MO approaches are implemented and tested within MOGA: a weighted-sum based approach and a Pareto-based approach.FindingsExperiments over a set of fuzzified test problems show the effect of these approaches on the performance of MOGA while verifying its efficiency in terms of both solution and time quality.Originality/valueTo the author’s knowledge, no previous published work in the literature has studied the biobjective assembly line worker assignment and balancing problem of type-2 (ALWABP-2) with fuzzy task times.

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.

scholarly journals Bottlenecks to product rate variation problem with batching

BIBECHANA ◽  
2012 ◽  
Vol 8 ◽  
pp. 53-58
Author(s):  
Shree Ram Khadka
Keyword(s):  
Optimal Solution ◽  
Rate Variation ◽  
Assembly Lines ◽  
Sequencing Problem ◽  
Variation Problem ◽  
Processing Times ◽  
Common Base

The product rate variation problem with batching minimizes the variation in the rate at which different models of a common base product are produced on the assembly lines with the assumption of significant setup and arbitrary processing times for each copy of each model. Establishment of bottlenecks to the problem is important for the feasible and the optimal solution to the problem. In this paper, the lower and the upper bottlenecks to the problem are established. Moreover, small bottlenecks that lead to optimality to some instances are investigated.Keywords: Product rate variation problem; batching; sequencing problem; nonlinear integer programmingDOI: http://dx.doi.org/10.3126/bibechana.v8i0.4876BIBECHANA 8 (2012) 53-58

scholarly journals Maximizing the robustness for simple assembly lines with fixed cycle time and limited number of workstations

2016 ◽  
Vol 208 ◽  
pp. 123-136 ◽  
Author(s):  
André Rossi ◽  
Evgeny Gurevsky ◽  
Olga Battaïa ◽  
Alexandre Dolgui
Keyword(s):  
Cycle Time ◽  
Assembly Lines ◽  
Simple Assembly

Enumerations and stability analysis of feasible and optimal line balances for simple assembly lines

2015 ◽  
Vol 90 ◽  
pp. 241-258 ◽  
Author(s):  
Yuri N. Sotskov ◽  
Alexandre Dolgui ◽  
Tsung-Chyan Lai ◽  
Aksana Zatsiupa
Keyword(s):  
Stability Analysis ◽  
Assembly Lines ◽  
Optimal Line ◽  
Simple Assembly

scholarly journals A Problem Specific Heuristic for Smoothing the Workload in Simple Assembly Lines

2019 ◽  
Vol 52 (13) ◽  
pp. 2562-2565
Author(s):  
Öncü Hazır ◽  
Maher Agi ◽  
Jérémy Guérin
Keyword(s):  
Assembly Lines ◽  
Simple Assembly

Identification of Production Rhythms in Synchronised Assembly Lines by Recording and Evaluating Current Processing Times

2013 ◽  
Vol 769 ◽  
pp. 350-358 ◽  
Author(s):  
Matthias Glonegger ◽  
Wolfgang Ottmann ◽  
Markus Schadl ◽  
Dominic Distel
Keyword(s):  
System Performance ◽  
Statistical Data ◽  
Time Measurement ◽  
Assembly System ◽  
Assembly Lines ◽  
High Exposure ◽  
Processing Times ◽  
Performance Requirements ◽  
Methodical Approach ◽  
Definition Of

Increasing demands on the flexibility of assembly workers lead to numerous times of high exposure rates within one shift. Inflexible processing times in synchronised assembly lines mismatch individual, circadian variable work capacities of operators. As a result, frequent performance peaks due to limited possibilities for individualisation elevate physiological and psychological workloads. The main objective of this paper is an individualisation of assembly system performance requirements. The conceptual framework presented gives the opportunity to specify diurnal assembly system performance requirements by recording and evaluating current processing times. The authors focus on the definition of demands on selecting a workstation, on raw data as well as on time measurement. Subsequently, a methodical approach to record current processing times as well as statistical data processing is presented. Moreover, the application of the presented method leads to an analysis of one representative workstation of a German car manufacturer’s engine assembly. Based on this, the authors define the production rhythm for this workstation and deduce statements on how to adapt the production system to current performance levels preventing physiological and psychological deterioration of assembly employees.

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