Availability check determination

Question

Hi ,
Can anyone inform  me how the Avail.Check field is determined while creating sales order. i.e., On which factors contents of this field depends on.
Thanks in  advance
Kiran.

Answer 1

hi,
Types of Availability Check in Sales and Distribution
Processing
There are three types of availability check:
_ Check on the basis of the ATP quantities
_ Check against product allocation
_ Check against planning
The following SD-specific control features need to be maintained in Customizing:
_ Checking group
The checking group controls whether the system is to create individual or collective
requirements in sales and shipping processing. In addition, a material block for the
availability check with transfer of requirements can be set here. The checking group can
also be used to deactivate the availability check. This option was created especially for
the assembly order so that when the bill of material is exploded in the assembly order,
the individual components, if necessary, can be classified as non-critical parts as far as
procurement is concerned.
The checking group specifies in combination with the checking rule the scope of the
availability check. It is proposed in the material master record on the basis of the material
type and the plant, and copied into the sales and distribution documents.
_ Checking Rule
You use the checking rule to control the scope of the availability check for each
transaction in sales and distribution. You also specify whether the check should be
carried out including or excluding replenishment lead time. The individual checking rules
define by transaction, which stock and inward and outward movement of goods should
be taken into account for the availability check.
_ Schedule line category
You can control with the schedule line category whether an availability check and
transfer of requirements should be carried out in the sales documents. The possible
settings for this at schedule line level are dependent on the settings in the requirements
class which is determined from the requirements type of the material.
_ Delivery item category
The delivery item category can be used to control whether an availability check takes
place in deliveries.
Requirements type
The various requirements are identified by their requirements type. The requirements
type refers to the requirements class and its control features.
_ Requirements Class
The requirements class contains all control features for planning such as relevance for
planning, requirements planning strategy and requirements consumption strategy. In
addition, it is specified at a global level whether an availability check is to take place for
the material in the sales and distribution documents on the basis of the ATP quantity
(ATP = available to promise) and whether requirements are to be passed on. A finer
degree of control can be obtained for sales documents using the schedule line category.
Replenishment lead time is only included in the check performed on the basis of the
ATP quantity.
Prerequisites
An availability check can only be carried out if the following prerequisites have been fulfilled:
_ The control elements described above for the availability check must be maintained in
Customizing for Sales and the relevant assignments made to the sales transactions
_ The availability check must be switched on at requirements class level and - for the
availability check in the sales documents - at schedule line category level
A requirements type must exist by which the requirements class can be found
_ A plant must be defined. It can either be proposed from the customer or material master
record or can be entered manually in the document.
_ A checking group must be defined in the material master record on the Sales/plant data
screen in the Availability check field
Configuring entries of the Availability Check
IMGSDBasic fncsAvailability check and TORAvailability checkAvailability check with ATP logic or against planningDefine checking groups
You can use SAP std checking groups of 01 for summarized reqts or 02 for daily reqts or u can create ur own.
The columns total sales and total deliveries are selection options whereby u can configure a checking rule to sum up reqts to post to MRP either individually or by day or week.
Column 5, Block qty; set this block if u want several users to be able to process the material simultaneously in different transactions without blocking each other. The No Check indicator is used when u want a material to not be relevant for an ATP check.
Defining a material block for other users. The Block checkbox is an indicator that enables u to block the particular material from being checked for availability if it is already being checked at the same time by another user.
Defining the default value for checking groups. However should no entry exist for the checking group in the material master record, one can set a default value per material type and plant.
Controlling the availability check. In this section, u tell the system what stock on hand and what inward and outward movements of stock it must take into account when performing the availability check. These settings are based on the checking group that is assigned to the material master record and the checking rule that is predefined and assigned to the sd transaction. The carry out control for the availability check must be maintained for both the sales order and delivery.
CHAN