Information Technology Reference
In-Depth Information
industry, multi-goals optimization, extensive search and the uncertainty problem
of workshop production. Event-based scheduling method is adopted here, in
which at least one resource is idle. Two or more operations can use this resource,
and OSR (Operation Selection Rule) decides which operation is loaded. OSR is
the key factor to determine the quality of planning. Independent operation
selection rules are shown in detail as follows:
(1) Early finish date: select early finished operation(maybe order finish date)
(2) Highest priority first: select operation with highest priority(minimum value)
(3) Lowest priority first: select operation with lowest priority(maximum value)
(4) Highest order attribute field: select operation with highest(maximum)
attribute field of order
(5) Lowest order attribute field: select operation with lowest(minimum) attribute
field of order
(6) Dynamic highest attribute field of order: select operation with dynamic
highest(maximum) attribute field of order
(7) Dynamic lowest attribute field of order: select operation with dynamic
lowest(minimum) attribute field of order
(8) Planning record order: select operation that first come first served in order
(9) Key rate: select operation with the minimum key rate
Key rate = planning working time left / (finish date - current date)
(10) Real key rate: select operation with the minimum real key rate
Real key rate =real working time left / (finish date - current date)
(11) Least remain operation(static): select operation with least remain operation
time
(12) Longest waiting time: select operation with the longest waiting time
(13) Shortest waiting time: select operation with the shortest waiting time
(14) Maximum process time: select operation with maximum process time
(15) Minimum process time: select operation with minimum process time
(16) Minimum operation idle time: select operation with minimum idle time idle
time of the order =remain finish time - remain working time idle time of
operation = idle time of task / remain operation number
(17) Minimum operation idle time: select operation with minimum idle time of
order
(18) Minimum remain time of work: select operation with minimum remain
work time of order
