Perform Site MRP
Explanation
This activity is used to calculate the supply and demand for material requirement
planning (MRP) parts based on shop orders, customer orders, etc. The system
creates MRP-planned orders for fulfilling these demands, such as purchase or
shop order requisitions, and offers suggestions to plan orders for optimal manufacturing,
considering material availability.
If MRP was performed previously then all the planned supplies and action
messages generated in the previous process will be removed first.
The MRP process generates supply and demand for MRP parts generated in the
following IFS modules: IFS/Customer Order, IFS/Customer Schedules, IFS/Supplier
Schedules, IFS/MRP (for spare parts), IFS/Project, IFS/Project Delivery, IFS/Master
Scheduling, IFS/Purchasing, IFS/Maintenance, IFS/DOP, IFS/Distribution Order,
and IFS/Shop Order.
Prerequisites
- BOMs must have been defined for the parts, and lead times for both the
purchased and manufactured parts must have been established. MRP only
uses the existing product structure with the alternate " * " indicated
by an asterisk(*).
- To perform MRP for master scheduled parts you must first have created
a master production schedule using IFS/Master Scheduling.
- To perform MRP for project planned parts you should first run PMRP.
- To perform MRP for DDMRP buffered parts must have been positioned using
the planning method H, also buffer zones and buffer levels must have been
established.
Note: MRP does not process parts with planning methods B - Order Point
Planning, C - Replenishment Level, M - Manufacturing Cell Part or N - Next Level
Demand.
System Effects
- After this process is executed, the Warning or Error status can apply.
Error indicates that some critical errors have occurred in the process,
and the MRP process has stopped. Warning indicates that a message posted
for this process has to be reviewed by the user. This can be done by using
the Show Details command in the
Background Jobs
page, which displays the message in the status information
table. If the user decides to continue the MRP process, the MRP process
will display error messages when the process is completed.
- MRP calculation will consider inventory parts where the MRP Control
option in
Inventory Part/Manufacturing tab page is enabled.
- MRP will generate shop order requisitions or non-firm production schedules
for parts that must be manufactured, and it will generate purchase requisitions
or supplier schedules for parts that must be purchased.
- Shop order requisitions and purchase requisitions that are not converted
into shop orders or non-firm production schedules are deleted the next time
you start the MRP process. MRP calculates the lowest level code of parts
and updates the Low Level on the
Inventory Part/Manufacturing tab.
- For buffered parts (using planning method H, Buffered Part) MRP planned
supplies are created without considering the demands that fall in future
but considering open supplies, on hand quantities, demands due today, past
due demands and qualified order spikes. Qualified order spikes are demands
which fall within the order spike horizon and which equals or exceeds the
order spike threshold.