Modelling and Solving Rescheduling Problems in Dynamic Permutation Flow Shop Environments
Table 2
Automatic RIPG configuration via Irace.
Parameter
Value
Data type
Range established for Irace
Size of the set of job solutions after the restart phase (working set).
124
Integer
[50, 200]
k (number of consecutive elements eliminated in the greedy phase’s destruction operation).
5
Integer
[1, 10]
nsel (number of elements selected randomly in the local search phase). Dynamic parameter dependent on the number of jobs in the instance to be solved.
nsel = ncount if ncount ≤ n 0.1 else nsel = n 0.1 n is the number of jobs and ncount is the number of times that a solution has been selected
Decimal
[0.1, 1]
nneigh (consecutive positions where a job is reinserted in the local search phase).
8
Integer
[1, 12]
Restart threshold (maximum number of iterations allowed without modifying the size of the nondominated solutions set. Once this value is surpassed, the working set randomly restarts).
