Answer / rajesh

Validation is used for consistency of the data
For eg; when a company having 4 business areas A,B,C,D
and 4 Company Codes 1,2,3,4
If u want the company 1 used only business area A and the
Company 2 used only B like wise to restrict not using
nonother then mentioned business area we use validation
rules

Substitution is used for facility

For eg; for doc type sa and company code 100 we want
narration as "being the company' for default display when
we select sa doc type this will done by substitution

Answer / abhay

SAP uses validations and substitutions to check the integrity of data entered before posting a
document. When you have both substitutions and validations defined, the system first completes
the substitution then goes on to validate the entries. Note that only one validation and one
substitution can be activated at a time for a controlling area per ‘call-up point.’***
A ‘Validation’ uses Boolean logic for checking any type of combination of specified criteria (such
as account type/cost center combination) for ensuring the validity before allowing you to post a
document.
Example:
Validation Rule: If the cost element is ‘120000,’ then the cost center is ‘1200.’
Document: You try posting a document containing the cost element as ‘120000’ and the
cost center is ‘1400.’
System Response: The system will throw an ‘error message’ after checking that the cost
center value does not match the cost center value of the criteria for that given cost element
value.
In contrast to validation which just checks for validity, substitution ensures that the system
replaces a value assigned to one or more fields based on predetermined criteria, using, again,
‘Boolean logic.’
Example:
Substitution Rule: If the cost element is ‘120000,’ then the cost center is ‘1200.’
Document: You try posting a document containing the cost element as ‘120000’ and the
cost center as ‘1400.’
System Response: The system will replace the entered cost center value of ‘1400’ with
that of the correct value ‘1200.’
What is a ‘Call-up Point’?
***A ‘Call-up Point’ is a particular point in transaction processing that triggers an action such as
substitution or validation.

Answer / venkat

validation are used for to check values at the time
posting we use validation
This is used for very limited field like business
area ,document types

substitution are used for fill the field without user
knowledge

this is used for text

how the Electronic bank statement will update ? will they use any other interface ? can u explain clearly ?

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