This paper lays down a formal framework for simultaneous scheduling of machines, automated-guided vehicles (AGVs) and tools in a multi-machine flexible manufacturing system (FMS) while accounting for transport times of parts to minimise makespan. To minimise tooling costs, a central
tool magazine (CTM) is suggested so that the tools are ‘shared’. AGVs and tool transporter (TT) carry jobs and tools between machines. The complexity of including sequencing of job operations on machines, assignment of AGVs and tools to job operations and corresponding trip operations
such as the empty trip and loaded trip times of AGVs and a CTM in scheduling is greater. The scope of this paper is to propose a nonlinear Mixed Integer Programming (MIP) model to minimise makespan. Since the problem is known to be NP hard, it is conjectured and then verified that the intelligent
behaviour of crows can be effectively used to lay down a metaheuristic algorithm known as a crow search algorithm (CSA) suitable for the problem at hand, and the results have been tabulated and analysed.
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Document Type: Research Article
Faculty of Mechanical Engineering, JNTUA, Ananthapuram, India
Mechanical Engineering Department, GIET, Rajamundry, India
Department of Electrical and Electronics Engineering, AITS, Rajampet, India
November 2, 2019
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