Question { 9795 }

how validations and substitutions are useful?

Answer

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.

Question { IBM, 8925 }

WHAT IS FUNCTIONAL SPECIFICATION & HOW DO YOU WRITE AND
GIVE ME ONE OR TWO EXAMPLE?

Answer

Functional specification : The documentation typically describes what is
needed by the system user as well as requested properties of inputs and outputs.
The functional specification is business-oriented. A functional specification does
not define the inner workings of the proposed system, nor does it include information
for how the system function will be implemented. Instead, it focuses on what
various
outside agents (e.g., people using the program,
computer peripherals, or
other
computers) might observe when interacting with the system.