Flexible job-shop scheduling problem with variable lot-sizing: An early release policy-based matheuristic

Variable lot-sizing is a production pattern that allows operations of the same job type to conduct different lot-sizing plans, which brings better flexibility compared to the routine consistent lot-sizing. However, under the variable lot-sizing scheme, since jobs in a sublot are likely to be released from multiple sublots of the previous operation, the sublot is forced to start being processed until all the predecessors are finished, and …