Please give me the solution how to solve fit gap analysis,in real time senorion with 3-- example.
Basically GAP is something which is different from standard SAP. That is if standard SAP offers you something & your client requires something else.
1 example which you can tell is this.
In standard SAP storage loc is determined in the delivery creation. It is basing on what storage loc rule you assign to the delivery. For eg LF - MALA. Then you maintain the storage loc determination in OVL3.
But if your client requirement is that storage loc determination should happen at order entry. This is a GAP.
You will fulfill this GAP through customizing. You will have the code in USEREXIT_SOURCE_DETERMINE in MV45AFZZ. In the code you will specify what are the conditons that will determine the storage loc in a sales order. You will 1st get the details from the business & pass on the requirement to the ABAPer explaining him the requirement.
Pls note that not all GAPs can be fulfilled thorugh customizing. There may be some GAPs which cannot be realised even by customizing. For eg: something like if you want to block the material entry if it is not available. This would not be possible / not suggeted coz unless you enter the material & quantity, system will not be able to do availability check.
Hope this helps.