why we need solution manager in sap ennvironmenent?

[srinu5]

is any difference between solution manager concept in sap level and non sap level ?

[blopezq]

At least you need Solution Manager in your sap eviroment if you plan to install a new sap system

[Ayax]

You need Solman in order to get installatin key for other products, that is the first reason why many companies install it, you can also use it for monitoring, change management, implementation, etc.
You can take a look at:
http://help.sap.com/saphelp_sm40/helpda ... ameset.htm

[hussaini]

its a good link ayax