Rockwell Automation FactoryTalk Scheduler Users Guide - Manual (Page 108)

F ACTORY T ALK S CHEDULER U SER ’ S G UIDE
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Resource Efficiency—alters the rate at which work is performed using a resource. The
actual work duration is the planned work duration divided by the efficiency. Hence,
values greater than 1 shorten the time and values less than 1 lengthen the time. An
efficiency of 0 makes the resource unavailable.
Resource Idle Cost—the cost accrued per unit time for an unallocated resource. This cost
value is used to compute activity-based costing (ABC) for the production lots.
Resource Set—a group of resources from which a selection can be made. A resource may
be included in more than one group.
Route—an unconstrained transfer of production lots from one station to the next. There
are no devices (such as a limited number of carts) that restrict the transfer. The route
activity requires a specified time to perform.
Scheduling—the process of creating a schedule. Schedules that consider the constraints
of material and resources are called finite-capacity schedules; those that do not are
called infinite-capacity schedules. Shop-floor schedules are typically finite-capacity
schedules.
Segment Data—a set of data defining the phase times, additional resources, material, and
constraints required to carry out a job segment. Product segment data is related to a
specific product or material, whereas process segment data is product independent.
Selection Logic—a collection of decision rules for deciding which production lot to
process next and which resource to use for processing. The selection logic may
include a lot selection rule, a resource selection rule, and a tie-breaking rule.
Sequencing—the process of determining the order in which a manufacturing facility
processes jobs in order to achieve certain objectives. Sequencing can be applied to
entire jobs or to individual operations.
Setup Phase—the first of three phases in an operation. The setup time can be a constant
or can be sequence dependent.
Site—a physical, geographical, or logical grouping of areas, lines, and work cells within
an enterprise. A geographical location (e.g., Dallas) and main production capability
(Brake Pads) usually identify sites.
Station—a physical location within a work cell where production lots are transferred into
and out of the work cell.
Tardiness—the positive difference between the completion time and the due date of a
tardy order.
Tardy Order—one that is completed after its due date.
Teardown Phase—the last of three phases in an operation.