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I've been trying to solve an optimization problem with ITERATED LOCAL SEARCH (ILS) method. I've generated the initial solution, then followed the steps of ILS. However, even after running the algorithm for a long time, it just keeps returning worse results. Could the perturbation function be the problem?

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  • $\begingroup$ Could you please provide a link to the reference that shows the algorithm you implemented (e.g. a reference with the pseudocode), so that we have more context? In the past, I came across this algorithm, but I want to make sure that we're talking about the same thing. Moreover, I suggest that you also and briefly describe your optimization problem. $\endgroup$ – nbro Dec 30 '20 at 10:04

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