Dear Sujith Rao,
Functional specification: The Functional Specification is a comprehensive document created after the Software Requirements Document. It provides more details on selected items originally described in the Software Requirements Template. Elsewhre organizations combine these two documents into a single document.
Functional specs is like a templeate document, hence it will be same whether it is AR or AP or CCA. Basically functional specs is a document which explains the requirements with technical details, so that technical consultant or any other person can read and understand what is the background of the report or an extension done in SAP.
The Functional Specification describes the features of the desired functinality. It describes the product's features as seen by the stake holders,and contains the technical information and the data needed for the design and developement.
The functional specs should have the following details:
Background: Information why this report is required and Business process involved in that.
Selection Parameters: This should what fields should be selection fields, which are optional and which are mandatory etc.
Layout of the report: What information is required in the output of the report. This should also indicate the technical names - Table and field names from where the data needs to be fetched.
Detailed Description: This should explain the logic of the report - what calculations needs to be done etc.
The Functional Specification defines what the functionality will be of a particulat area that is to be precise a transaction in SAP terminology.
It also contains the data regarding change history, if any.
Functional Spec is mainly prepared for the purpose of developing the new reports (this happens only when SAP standard report not achieve the client purpose) using the ABAP Program. for ABAPers you need to give the details of the Tables , Fields and the logic how to pick the value and get the report.
Visit the following links:
http://www.sap-img.com/general/what-are-functional-specification-in-sap.htm
http://www.epri.com/eprisoftware/processguide/funcspec.html
Regards,
Naveen.
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