ANY EXIT available for ME49 quotation comparision

Question

dear SAP  gurus,
i need to build the logic and apply exit to me49 tcode in such a way that it should check the minimum number of quotations must be be three .
Is there any exit which supports and how logic to be devoloped.
pl comment on this .
nagaraju.

Answer 1

HI Nagaraju garu,
I am giving the information for ur issue.if answer is helpfull reward me the points immediately.
The request for quotation (RFQ) process starts with a request for material(s) from a vendor(s). The RFQ process includes offer comparisons to selection of the best source. The buyer will evaluate the responses from vendors to determine the best source of supply. The accepted quotation will be processed into a purchase order and a reject letter is sent to the vendor(s) whose quotations were rejected. 
Material-specific information including vendor pricing and lead-time from the quotation are captured within SAP master data records.
4.2     Enter Quotations
Use
In this activity you will enter quotations.
Procedure
1.     Access the transaction choosing one of the following navigation options:
SAP ECC Menu     Logistics → Materials Management → Purchasing →  RFQ/Quotation → Quotation → Maintain
Transaction code     ME47
2.     On the Maintain Quotation: Initial Screen screen, enter an RFQ number and press Enter:
3.     On the Maintain Quotation: Item Overview screen, enter a price in the Net Price field and choose Save.
You can also choose Item Conditions (Shift + F6) to enter other condition types, such as discount, surcharge and freight cost etc.
4.     Repeat steps for all quotations.
Result
Quotations are entered.
4.3     Compare and Select Vendor
Use
This can be done once all quotations have been entered.
Procedure
1.     Access the transaction choosing one of the following navigation options:
SAP ECC Menu     Logistics → Materials Management → Purchasing →  RFQ/Quotation → Quotation → Price Comparison
Transaction code     ME49
2.     On the Initial screen, enter quotation range or coll. no. and choose Execute.
3.     For the selected vendor, click on column and choose the Quotation button.
4.     On the Maintain Quotation screen, select line item and choose Item Detail (F2) button.
5.     In Quotation Data section, in InfoUpdate field, enter B and choose Save.
If it is the same buyer for all plants, select C.
6.     To return to the Price Comparison screen, choose Back.
7.     Select a rejected vendor and choose the Quotation button.
8.     On the Maintain Quotation screen, choose Item Detail button.
9.     To reject a quotation, select the Rej. Ind. checkbox and choose Save. Repeat for additional rejected vendors.
Result
Approved quotation is saved, other quotations are rejected.
Option A: For all rejected quotations, perform the next step.
Option B: For all approved quotations, skip the next step and continue with the rest of the process.
4.4     Rejection of RFQ
Use
This can be done once all quotations have been entered by the purchasing manager.
If RFQ is rejected, the reject RFQ letter can be printed automatically.
4.5     Purchasing Info Record Update
Use
This can be done once all quotations have been entered by the purchasing manager.
If RFQ is accepted, the purchasing info record will get updated automatically
and u asked about exits right?
we will use  user exits for this purpose .
and follow the above process for creating your three different quotations
for ny isuues reply me and reward me if the answer is helpfull to me...pls
thsnks karthik