In this paper we propose a hybrid firefly algorithm(HFA) for the resource-constrained project scheduling problem(RCPSP). HFA introduces priority value based representation as location of firefly and time difference of makespan as distance between any two fireflies. Forward-backward improvement is adopted to improve the quality of schedules. The configuration experiment on the standard test set j30 helps to select parameters of the HFA. The comparison experiments performed on the test sets j60 and j120 show that HFA is efficient in solving RCPSP problem.
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