There are several ways that the putaway and picking strategies can be influenced, for example by:
You create and maintain these objects using the Customizing application. For more information, see the Strategies section of the Warehouse Management section in the Implementation Guide (IMG). For each of the first three options, the system lists additional objects that you need to maintain and the order in which they should be maintained.
Cross-Line Stock Putaway
In this function, a sort variable helps the system to search for suitable storage bins. With the sort variable, you can eliminate the problems caused by one-sided loading in the warehouse and optimize the stock putaway process in your warehouse. If the sort variable has not been defined, the system sorts using the storage bin coordinate itself.
With the putaway strategies L (next storage bin) and P (storage unit type), you can influence the search for a suitable storage bin with the help of a sort variable. This method can also be set up for storage types with putaway strategies L (Addition to existing stock) or B (Bulk storage), since if the system does not find a bin for adding to existing stock, it will use sort variables to find an empty storage bin.
You define the sort variable for cross-line stock putaway in Customizing for Warehouse Management. For further information, refer to the Implementation Guide (IMG) for Warehouse Management under the section Strategies.
For each storage type, you can use up to six fields of the storage bin coordinate to define the sort variable. You determine which positions of the coordinate are relevant for the variable structure and in which sequence the individual positions are used in the variable.
For example, storage type 001 has
The fourth and fifth positions of the coordinate, which represent the two digits of the stack, make up the first two positions of the variable. The seventh and eighth positions of the coordinate, which represent the two digits of the level, make up the last two positions of the variable. To define the sort variable, enter the numbers 1, 2, 3, 4, and 5, as shown below, in the data entry table. Start at the fourth position.
Positions in bin coordinate ------
When the system looks for an empty bin with the new structure, the first storage bin it finds is 01- 01-01. However, the next time it looks for an empty bin, the next coordinate it finds is 02-01-01, which represents the first stack in the second row. This process continues until all stacks in all rows are filled for the storage type. You must define the sort variable before you create the storage bins. Any subsequent changes to the table affect only newly created storage bins.
In the examples below we use the "next empty bin" strategy to explain the concept of cross-line searching.
The view shown in the figure is a top view looking down on the warehouse. To make things simpler, we assume that the warehouse consists of one level.
Searching for Bins Without a Sort Variable
When searching for empty storage bins without using a sort variable, the system makes its search based on the following structure:
With this structure, the system fills the warehouse row by row. For example, the system fills the first row completely first, then the second row, then the third. This can result in a one-sided load of the warehouse.
Searching for Bins with a Sort Variable
When you define a sort variable, empty storage bins are sorted differently. For example, you transfer goods first to stack 01, level 01 in row 01, then to stack 01, level 01 in row 02, then to stack 01, level 01 in row 03, and so on. In this case, you define the sort variable as follows, where R is the row, S is the stack and L is the level:
With the sort variable, empty storage bins have the following structure.
With this structure, the system fills the bins in the warehouse on a stack-by-stack basis for each row. When the system selects bins for stock received in the warehouse, the first stack in each row is filled, then the second stack in each row, then the third stack, and so on.
For some putaway strategies, it is advantageous to require that the system check the capacity of the storage bin when it searches for an available bin. If the capacity check is active, it means that during the process of transfer order creation, the system checks whether the storage bin you selected has the capacity to store the quantity that is to be put away.
You can implement capacity checking on the basis of a storage type when you define the putaway strategy or the storage type in the Warehouse Management section of Customizing. For more information about activating the capacity check, refer to the Implementation Guide (IMG) for Warehouse Management under Master Data →Define Storage Type. To activate the capacity check, enter the number that represents the checking method in the Capacity check method field for the putaway strategy in the storage type record.
In order to control the capacity check according to capacity indicators, the following basic prerequisites must be met:
There are six options available for capacity checking in the Warehouse Management (WM) component. The capacity of a bin can be checked on the basis of:
We recommend that you implement a capacity check for the “fixed bin storage” and “addition to existing stock” putaway strategies. For bulk storage, capacity checking is carried out in the block definition.
Capacity check according to capacity indicator
You can also use the capacity indicator to control the storage of materials in a storage bin. Depending on the capacity check you select, the system calculates the capacity usage differently.
Since the capacity usage is dependent upon the quantity of the material, it is characterized as a variable in the system and is updated in the quant. The capacity usage of an SUT is characterized as a constant capacity usage and is updated in the storage unit in SU-managed storage types and in the quant in non-SU-managed storage types.
Data from quants and storage units are updated for each storage bin as a remaining capacity. This remaining capacity is recorded in the empty bin index. This makes it possible to efficiently find an occupied storage bin with a specific remaining capacity by using a customer exit, for example.
Capacity Checking Based on a Neutral Indicator
The following examples correspond to the three neutral capacity checks. For these examples. The following conditions apply:
The capacity checks in points 2 and 3 only function properly when the SUT check and SU management are active in the storage type record.
If the material is stored in the bin with one piece per E1 pallet, 4 pallets will fit in the bin (44 + 48) and a remaining capacity of 8 exists as shown below. This capacity check is advantageous if the pallets are stacked on top of each other and the thickness of the pallet must be taken into consideration.
Before you make the first stock placement, you need to define the type of capacity check and the capacity usage of material and storage unit types. Changes that are made to these parameters afterwards cause automatic changes to storage bins, storage units and quants. If you make changes in the operational system, you must run report RLS10200 to adjust the occupied capacities for bins, storage units and quants.
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Sap Wm Tutorial
Warehouse Management Guide
Warehouse Structure In The Warehouse Management System
Planning And Monitoring
Basic Stock Management
Hazardous Materials Management
Wm Interface To Quality Management
Stock Transfers And Replenishment
Posting Changes In Wm
Putaway And Picking Strategies
Storage Unit Management
Interfaces To External Systems
Mobile Data Entry
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