Balancing Multi-Manned Assembly Lines With Walking Workers: Problem Definition, Mathematical Formulation, and an Electromagnetic Field Optimisation Algorithm

Şahin, Murat; Kellegöz, Talip

doi:10.1080/00207543.2019.1566672

Cited by 32 publications

(10 citation statements)

References 32 publications

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“…& WW number of operators/stations analysis and optimization. [38] observe the interrelationships between the number of workstations and the number of walking workers for their minimization, while [39] proposes a methodology for minimizing number of workers and smoothing workload among stations, and [40] analyze multi-manned assembly with walking workers for minimizing the number of workers and workstations. & WW and lean principles analysis.…”

Section: Literature Reviewmentioning

confidence: 99%

Walking worker vs fixed worker assembly considering the impact of components exposure on assembly time and energy expenditure

Calzavara

Faccio

Persona

et al. 2021

Int J Adv Manuf Technol

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Recently, the need for assembly systems of better following the market demand has led to the spread of alternative solutions with respect to the traditional fixed worker strategy. Walking worker systems, where operators move across the line to produce the finished product, are gaining always more interest. In this paper, a comparison between the fixed worker (FW) and the walking worker (WW) assembly strategies is provided, by taking into account their differences both in terms of performed activities during assembly and of material exposure at the assembly workstations. The evaluation is carried out through the proposal of a mathematical model, to understand the impact on assembly time and on operators’ energy expenditure. The behavior of the model is investigated both with a parametric analysis and a real case study. The results show that the FW is the best one when the system is working at its maximum throughput, while the WW strategy turns out to be preferable for the lower values of market demand, both from a time and an energy expenditure perspective.

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Section: Literature Reviewmentioning

confidence: 99%

Walking worker vs fixed worker assembly considering the impact of components exposure on assembly time and energy expenditure

Calzavara

Faccio

Persona

et al. 2021

Int J Adv Manuf Technol

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show abstract

“…Processing times are generally very long in multi-manned workstations since they are often used in the manufacturing of large-sized products (Dimitriadis, 2006). In these lines, it is generally allowed workers to pass from one workstation to another, and walking distance between workstations can be very small compared to the duration of the processing times at workstations (Şahin & Kellegöz, 2019). Note that the above decrease in processing times does not increase system capacity, since during its absence the worker's home workstation cannot process any job.…”

Section: Labour Flexibilitymentioning

confidence: 99%

The use of labour flexibility for output control in workload controlled flow shops: A simulation analysis

Staudacher¹,

Costa²,

Thürer³

2020

10.5267/j.ijiec

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Workload control theory seeks to align capacity and demand to improve delivery performance. However, workload control researchers mainly focused on input control, which regulates the input of work to the production system, thereby neglecting output control, which uses capacity adjustments to regulate the outflow of the work. Moreover, few existing studies on output control investigate a temporarily increase in capacity. This paper introduces a new search direction for output control which does not require an increase in capacity-labour flexibility. Idle operators can move from their workstation to another, thus temporarily increasing the output of that workstation without extra capacity. Using simulation of a five workstations flow shop line, we highlight the positive performance effect of labour flexibility. However, this comes at the cost of high labour movement. Introducing a load-based constraint on when workers are allowed to move significantly reduces labour movement, while realizing most of the performance improvement observed for unconstrained labour movement. This has important implications for future research and practice.

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“…Constraint (16) observes the sequence of stations' index in lines. Constraints (17) and (18) ensure that the range of the finish time of task i is between its completion time and the cycle time. Constraints (19)- (23) are the internality constraints.…”

Section: E Mathematicalmentioning

confidence: 99%

“…For other extension of MALBP-I, Chen et al [17] additionally considered the resource constraint. Şahin and Kellegöz [18] assumed that workers could walk between different stations. Lopes et al [19] defined the flexible multimanned assembly lines with flexible station frontiers, in which multiple workers in the same station were allowed to start operating as possible as they can.…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Model and a Simulated Annealing Algorithm for Balancing Multi-manned Assembly Line Problem with Sequence-Dependent Setup Time

Yang

Cheng

2020

Mathematical Problems in Engineering

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Multi-manned assembly lines have been widely applied to the industrial production, especially for large-sized products such as cars, buses, and trucks, in which more than one operator in the same station simultaneously performs different tasks in parallel. This study deals with a multi-manned assembly line balancing problem by simultaneously considering the forward and backward sequence-dependent setup time (MALBPS). A mixed-integer programming is established to characterize the problem. Besides, a simulated annealing algorithm is also proposed to solve it. To validate the performance of the proposed approaches, a set of benchmark instances are tested and the lower bound of the proposed problem is also given. The results demonstrated that the proposed algorithm is quite effective to solve the problem.

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Balancing Multi-Manned Assembly Lines With Walking Workers: Problem Definition, Mathematical Formulation, and an Electromagnetic Field Optimisation Algorithm

Cited by 32 publications

References 32 publications

Walking worker vs fixed worker assembly considering the impact of components exposure on assembly time and energy expenditure

Walking worker vs fixed worker assembly considering the impact of components exposure on assembly time and energy expenditure

The use of labour flexibility for output control in workload controlled flow shops: A simulation analysis

A Mathematical Model and a Simulated Annealing Algorithm for Balancing Multi-manned Assembly Line Problem with Sequence-Dependent Setup Time

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