23 lines
938 B
MiniZinc
23 lines
938 B
MiniZinc
include "fzn_cumulative_opt.mzn";
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include "fzn_cumulative_opt_reif.mzn";
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/** @group globals.scheduling
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Requires that a set of tasks given by start times \a s, durations \a d, and
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resource requirements \a r, never require more than a global resource bound
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\a b at any one time. Start times are optional variables, so
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that absent tasks do not need to be scheduled.
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Assumptions:
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- forall \p i, \a d[\p i] >= 0 and \a r[\p i] >= 0
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*/
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predicate cumulative(array[int] of var opt int: s,
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array[int] of var int: d,
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array[int] of var int: r, var int: b) =
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assert(index_set(s) == index_set(d) /\ index_set(s) == index_set(r),
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"cumulative: the 3 array arguments must have identical index sets",
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assert(lb_array(d) >= 0 /\ lb_array(r) >= 0,
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"cumulative: durations and resource usages must be non-negative",
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fzn_cumulative_opt(s,d,r,b)
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)
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);
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