An integrated approach to mixed-model assembly line balancing and sequencing

Purpose - Design, balancing, and sequencing are the key issues associated with assembly lines (ALs). The purpose of this paper is to identify AL design issues and to develop an integrated methodology for mixed-model assembly line balancing (MMALB) and sequencing. Primarily, mixed-model lines are utilized for high-variety, low-volume job shop or batch production. Variation of a generic product is important for the manufacturers as the demand is mostly customer driven in the present global market. Design/methodology/approach - Different AL design norms, performance indexes, and AL workstation indexes have been identified in the initial stage of this work. As the paper progresses, it has focused towards an integrated approach for MMALB and sequencing addressed for small- and medium-scale assembly plants. A small-scale practical problem has been justified with this integrated methodology implemented by MATLAB. Findings - ALs execution in the production floor require many important factors to be considered. Different line orientations, production approaches, line characteristics, performance and workstation indexes, problem definitions, balancing and product sequencing in accordance with the objective functions are needed to be taken into account by the line designer. Originality/value - This paper has highlighted the important AL design characteristics and also provided an integrated approach for balancing mixed-model assembly lines (MMALs) combined with sequencing heuristic. The findings of this paper can be helpful for the designers while designing an AL. The integrated approach for balancing and sequencing of MMALs can be used as a functional tool for assembly-based contemporary industries.