plz tell me the importance of 4 mrp views in material master.
how do the system know that avail check is based upon ATP
Dear Anil singh
Your question is too large to explain. However, in nutshell, I can brief about MRP views.
MRP1 - In this tab, you are defining whether the material is relevant for MRP, if so, who is the MRP controller, what would be your lot size etc.
MRP2 - In this, you are defining whether the material would be procured externally, or only inhouse operation or both, time taken for inhouse production, number of days for GR processing etc.,
MRP3 - In this, you are defining which strategy you should adopt whether make to order or make to stock, whether the availability check should be based on daily requirements or individual requirements etc.
MRP4 - In this, you are defining the production version of that material, allowed percentage of scrap that occurs during production of the material if the material is a component, whether the material is a repetitive manufacturing or not etc.
With regard to Availability Check, there are three types of availability check:
a) Check on the basis of the ATP quantities
b) Check against product allocation
c) Check against planning
In Customizing, you determine whether an availability check is to be carried out against the ATP quanitity or against planning. The check against product allocations is controlled in the material master and elsewhere in the system.
Check on the Basis of the ATP Quantities
The ATP quantity (ATP = Available To Promise) is calculated from the warehouse stock, the planned inward movements of stock (production orders, purchase orders, planned orders) and the planned outward movements of stock (sales orders, deliveries, reservations). This type of check is performed dynamically for each transaction, taking into account the relevant stock and planned goods movements with or without replenishment lead time. Planned independent requirements are not taken into account here.
Check against Product Allocation
Product allocation facilitates period-based distribution of products for certain customers or regions. As of Release 3.0F, you can carry out an availability check against product allocation. This ensures, for example, that when production is low, the first customer does not get the full amount, resulting in following sales orders not being confirmed or being confirmed far too late.
Check against planning
The check against planning is performed against independent requirements which are usually created for an u2018anonymousu2019 market rather than being customer-specific (for example, in the strategy u2018Planning without assemblyu2019, when production occurs only up to the stocking level). The planned independent requirements result from demand program planning and are used for planning expected sales quantities independent of orders