Affiliations: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, Hubei, China
Correspondence:
[*]
Corresponding author: Yabo Luo, School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China. E-mail:[email protected]
Abstract: Earliness/tardiness scheduling is a new scheduling mode based on the concept
of JIT (Just-In-Time). When compared with the traditional job-shop
scheduling, earliness/tardiness scheduling involves more complex constraints
and thus is a more complicated combinatorial optimization problem. This
paper proposes a strategy based on reverse constraints satisfying to improve
the genetic algorithm (GA) so that the earliness/tardiness scheduling
problem could be solved. The main contents include three parts: (1) the
mathematical modeling of earliness/tardiness scheduling is constructed,
which is more complex than the common job shop model; (2) the reverse
scheduling tactics based on GA are proposed, which includes the GA coding
design based on work-piece unit, reversing decoding methods, and the GA
fitness evaluation method based on reverse constraints satisfaction; (3) the
comparative experiments have been done to show the advantages of reverse
scheduling tactic compared with the forward scheduling. The comparative
experiment results show the reverse scheduling tactic has practicability and
feasibility to solve the job-shop earliness/tardiness scheduling problem.
