Cost Reduction and Productivity Improvement in Mixed-Model Assembly Lines through Workstation Optimization
Abstract
Assembly line balancing is a critical factor in the design and optimization of production systems, especially in multi-product environments. This paper presents a multi-objective mathematical model for mixed-model assembly line balancing, aiming to simultaneously minimize the number of workstations and the total equipment cost. The model incorporates precedence constraints, cycle time limitations, and task assignment rules. A computational experiment is conducted using the optimization software to validate the model's performance on a numerical example. Results demonstrate that the proposed approach efficiently reduces both the required number of stations and associated costs within a short computational time. This study contributes to the field by integrating cost efficiency into classical balancing frameworks, offering a practical solution for enhancing productivity and resource allocation in modern manufacturing settings.
Keywords:
Mixed-model assembly line balancing, Linear programming, Equipment cost reduction, Multi-objective optimizationReferences
- [1] Simaria, A.S. and P.M. Vilarinho, A genetic algorithm based approach to the mixedmodel assembly line balancing problem of type II .Computers & Industrial Engineering, 2004. 47(4): p. 391-407.
- [2] Torenli, A., Assembly line design and optimization. Chalmers University of Tech ,.Chalmers University of Technology, Goteborg, Sweden, Master of Science thesis,2009.
- [3] Navaei, J., et al., Heuristics for an assembly flow-shop with non-identical assembly machines and sequence dependent setup times to minimize sum of holding and delay costs. Computers & operations research, 2014. 44: p. 52-65.
- [4] Salimifard, K., R. Ghasemiyeh, and S. Pasban, Vertical Balancing in Multi-sided Assembly Lines Using Simulated Annealing Algorithm. Journal of Production and Operations Management, 2017. 14(1): p. 21-44.
- [5] Solimanpur, M. and B. Jaberi. Multi-Objective Mathematical Model for Time and Space Assembly Line Balancing Problem. in International Conference on Industrail Engineering and Operations Management.201.
- [6] Anderson, E.J. and M.C. Ferris, Genetic algorithms for combinatorial optimization: the assemble line balancing problem. ORSA Journal on Computing, 1994. 6(2): p. 161-173
- [7] Scholl, A. and R. Klein, Balancing assembly lines effectively–A computational comparison. European Journal of Operational Research, 1999. 114(1): p. 50-58.
- [8] Alinaghian, M, Naderipour, M., A novel Comprehensive Macroscopic Model for Time-Dependent Vehicle Routing Problem with Multi-Alternative Graph to Reduce Fuel Consumption: A case study, Computers & Industrial Engineering, 2016. 99: p. 210-222
- [9] Naderipour, M, Alinaghian, M., Measurement, Evaluation and minimization of CO2, NOx, and CO emissions in the open time dependent vehicle routing problem, Measurement: Journal of the International Measurement Confederation, 2016. 90: p. 443-452
- [10] Wee, T. and M.J. Magazine, Assembly line balancing as generalized bin packing. Operations Research Letters, .
- [11] Kim, Y.J., Y.K. Kim, and Y. Cho, A heuristic-based genetic algorithm for workload smoothing in assembly lines. Computers & Operations Research, 1998. 25(2): p. 99-111.
- [12] Tanhaie, F., Rabbani, M., & Manavizadeh, N. (2022). Sequencing mixed-model assembly lines with demand management: Problem development and efficient multi-objective algorithms. International Journal of Production Research, 60(10), 3456–3470
- [13] Tanhaie, F., Rabbani, M., & Manavizadeh, N. (2023). Applying available-to-promise (ATP) concept in mixed-model assembly line sequencing problems in a Make-To-Order (MTO) environment: Problem extension, model formulation and … International Journal of Production Research, 61(8), 1234–1245.
- [14] Bukchin, J. and J. Rubinovitz, A weighted approach for assembly line design with station paralleling and equipment selection. IIE transactions, 2003. 35(1): p. 73-85.