A hybrid multi pass approach has been proposed by Kolisch and Drexl
(1996). The heuristic applies the serial SGS with the LFT{priority rule and
the parallel SGS with the WCS{priority rule while employing deterministic and
regret based sampling activity selection. The decision on the specic method
is based on an analysis of the problem at hand and the number of iterations
already performed. Partial schedules are discarded by the use of lower bounds.
Schirmer and Riesenberg (1998) have extended this approach by employing
both schedule generation schemes together with four dierent priority rules
(MTS,LFT,LST,WCS) and two dierent sampling schemes (MRBRS,RBRS).
Table 7:5 gives a survey of priority rule based heuristics for the RCPSP where
with `p' and `s' it is referred to the parallel and the serial SGS, respectively. Note, that this convention holds for all tables in this chapter.
A hybrid multi pass approach has been proposed by Kolisch and Drexl(1996). The heuristic applies the serial SGS with the LFT{priority rule andthe parallel SGS with the WCS{priority rule while employing deterministic andregret based sampling activity selection. The decision on the speci c methodis based on an analysis of the problem at hand and the number of iterationsalready performed. Partial schedules are discarded by the use of lower bounds.Schirmer and Riesenberg (1998) have extended this approach by employingboth schedule generation schemes together with four di erent priority rules(MTS,LFT,LST,WCS) and two di erent sampling schemes (MRBRS,RBRS).Table 7:5 gives a survey of priority rule based heuristics for the RCPSP wherewith `p' and `s' it is referred to the parallel and the serial SGS, respectively. Note, that this convention holds for all tables in this chapter.
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