Mr Patra and Sai,
your posts were helpful to me.
What i understood is: Inventory Number is actually a material number which is created in mm.
For which we have different vendors/manufacturers to provide the material when needed.
I added one vendor and part number for my inventory material in purchasing tab along with Manufacturer part profile(which is needed to add multeple vendors to the same inventory material).
Now i have created two materials with material type:HERS and added inventorymaterial number to it along with its own part number and manufacturer.
When i am checking the part numbers of my inventory material number, i could see one in Purchasing tab and remaining 3 in product structure under manufacturer parts.
Did i get this right ?