OM CH: 9 Flashcards
Exception Messages
Reschedule in
Reschedule out
Planned order due for release
Parameter violation
Reschedule in
(if the available balance becomes negative, because the scheduled receipt is too late. Like it has to be put a week or two earlier).
Reschedule out
(if the available balance is enough to cover gross requirements. It does not become negative but there is a scheduled receipt which is not needed yet.)
Planned order due for release
(is a shortage can not be fixed, because lead time is too much and order is required earlier.)
Parameter violation
If the MRP schedule does not play by the rules of the game
System nervousness
extremely variable demand in MPS
Two ways to avoid system nervousness
- Time fences: you block information for certain periods of the MRP schedule
- Pegging: look for cause in BOM
available-to-promise
room to accept more customer orders.
Like MPS is 40 for 3 periods but only 37 items were ordered so far. 3 = available-to-promise
Bull-whip effect (Forrester effect)
small order changes from the customer to the producer cause big variation the other way around.
downstream demand
demand from the consumers. Consumers are downstream. Producers are upstream.
Lumpy-demand effect
ROP systems are not suitable for high unexpected demand
What is aggregate planning for and what is another word for it?
For planning the medium term.
It is above the MPS BOM and MRP
Another word is Sales and Operations
Disaggregation
planning from medium or long term to short term
The low-level code
The low-level code represents the lowest level of the item in any current, job, or production schedule bill of material (BOM). A low-level code of 0 indicates that the item is an end item (finished good) and is not a subcomponent of another item.
MRP
Material Requirement Planning.
Determines the number of products we need for all products of the BOM
