Material Requirements Planning Flashcards
MRP has 2 major functions:
1-Based on the MPS quantities and due dates for end items, create a time phased plan that determines what components are needed to make a product and when. This is called a priority plan.
2-Maintain and adjust the priority plan to account for changes in customer orders,forecasts,material shortages and production problems.
MRP is the bridge between …
Master planning and production in the factory.
MRP is the last of…
the priority planning levels.
MRP is directly linked to 3 other MPC functions:
1-Master scheduling
2-CRP
3-PAC
MRP calculates a time-phased priority plan which consists of:
1-Order release and receipt dates for the purchase and manufacture of components.
2- The final assembly operation
MRP has 2 major objectives:
1-Determine requirements
2-Keep priorities
MRP determines requirements by addressing the following questions:
1-What components are required.
2-What quantity of each component will be required.
3-When will orders be released and received.
Material planners keep the priority plan current in the face of changing customer sales orders and due dates by actions that include:
1-Expediting or de-expediting work orders(e.g. shop orders or manufacturing orders)
2-Changing work orders or purchase orders such as quantites and due dates
3-Adding or canceling work orders or purchase orders
The inputs to MRP are:
1- MPS
2-BOM
3-Ineventory record file
4-Item master file(planning factors like: lot size,lead time,yield and scrap factors, safety stock)
Planners, with the support of MRP software, release planned orders that authorize the following:
1-the release of purchase orders to suppliers
2-the release of manufacturing orders to factory
Example of MRP calculations are:
1-Exploding BOMs for determining an end item´s component quantities, down to the component and raw material level
2-Checking inventory records for quantities on hand, on order or allocated
3- Offsetting order release and receipt dates for net component and raw material requirements from the end item due date
MRP software keeps track of due dates in the priority plan and the status of materials and production. It also…
1-advises planners on when to release planned orders
2-advises when to expedite or take other actions to maintain the due dates in the priority plan
3-replans MRP on a periodic basis to update material requirements,due dates,and inventory status
Which is one of the most important documents in a manufacturing company, the major block of MRP?
BOM
A summarized BOM is a …
List of all the components in an assembly. For each component, a bill shows a unique part number, a description,the quantity needed in the assembly of its parents, and the unit of measure.
The indented bill is more commonly used and gives an indication…
Of an assembly or end-item product structure.
In the bill, the purchased components’…
Components are not shown.
In practice, glue might often be purchased as an operating supply item and not be included in the BOM. Tracking the specific amount of glue acrually used could be impractical. This practice enables the costs to be included as part of the …
Overhead.
BOM is a …
Listing of all the subassemblies, intermediates,parts,and raw materials that go into a parent assembly showing the quantity of each required to make an assembly.
Single-level BOM is a …
product tree format to facilitate learning and understanding.
BOM applications software stores information for each assembly and subassembly as a …
Separate and unique single-level bill.
When BOM data for end-item are needed for MRP purposes, the BOM application will…
Assemble the single level bills for all of the assemblies into a multilevel bill for the end item. The subassembly single-level bills can be used for any end item that requires them.
A multi-level BOM is a…
Collection of single-level bills.
A subassembly parent can also be a …
Component of an assembly or subassembly.
If a component has no other components going into it, it cannot be a …
Subassembly and it’s an item purchased from a supplier.