Rockwell Automation FactoryTalk Scheduler Users Guide - Manual (Page 62)

F ACTORY T ALK S CHEDULER U SER ’ S G UIDE
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Fewest Remaining Operations (static): The operation whose job has the fewest
remaining operations is selected.
„
Longest Waiting Time: The operation that has been waiting the longest will be
selected.
„
Shortest Waiting Time: The operation that has been waiting the least will be
selected.
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Largest Processing Time: The operation with the largest processing time will be
selected.
„
Smallest Processing Time: The operation with the smallest processing time will be
selected.
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Smallest Operation Slack: The operation with the smallest operation slack is
selected. Job slack is defined as the time remaining until the job due date, minus the
remaining work. Operation slack is defined as the job slack divided by the remaining
number of operations to complete the job.
„
Smallest Order Slack: The operation with the smallest job slack is selected. Job slack
is defined as the time remaining until the job due date, minus the remaining work.
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Smallest Work Remaining: The operation with the smallest remaining process time
(for all operations required to complete the job) is selected.
Summary of standard independent resource selection rules
Brief descriptions are given below.
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Earliest End Time: The resource that will complete the operation first will be
selected.
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Earliest Start Time: The resource that will start the operation first will be selected.
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Latest End Time: The resource that will complete the operation last will be selected.
„
Same As Previous Operation: The resource that was used for the previous operation
will be selected.
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Non-Bottleneck Earliest Start Time: The non-bottleneck resource that will start the
operation first will be selected. If there are no identified bottleneck resources in the
resource group, this rule will default to the Earliest Start Time.
Summary of dependent selection rules
Brief descriptions of the standard dependent selection rules are given below that describe
the operation selection rule. A corresponding resource selection rule, which respects the
operation selection rule, is automatically assigned.