Unit 11 Scheduling Flashcards
Schedule
A timetable for performing work that indicates how resources are to be used over time
Manufacturing Execution System (MES)
An information
system that schedules, dispatches, tracks, monitors, and
controls production on the factory floor.
Workcenter
Often referred to as a job shop, a process structure suited for low-volume production of a
great variety of nonstandard products. Workcenters
sometimes are referred to as departments and are
focused on a particular type of operation
Infinite loading
Work is assigned to a workcenter based
on what is needed over time. Capacity is not considered.
Finite loading
Each resource is scheduled in detail
using the setup and run time required for each order. The system determines exactly what will be done by each
resource at every moment during the working day
Forward scheduling
Schedules from now into the future
to tell the earliest that an order can be completed.
Backward scheduling
Starts from some date in the
future (typically the due date) and schedules the required operations in reverse sequence. Tells the latest time
when an order can be started so that it is completed by a specific date.
Johnsons Rule
A sequencing rule used for schedulling any number of jobs on two machines. The rule is
designed to minimize the time required to complete all
the jobs.
Assignment method
Assignment method A special case of the transportation method of linear programming that is used to allocate a specific number of jobs to the same number of
machines
Shop-floor (production activity) control
A system for utilizing data from the shop floor to maintain and communicate status information on shop orders and
workcenters
Input output control
Work being released into a
workcenter should never exceed the planned work output. When the input exceeds the output, backlogs build up at the workcenter that increase the lead time
