We do not have procedure for software validation.To start with, can I check if you have a procedure on software validation?
The level of software validation depends if it is Commercially Off The Shelf (COTS), Modified Off The Shelf (MOTS; meaning you purchase a COTS but customize/configure certain elements); or if it is Custom made for your organization. In the hierarchy of software validation, the COTS is minimal while Custom is maximum. Typically, when you carry out the software validation in your facility, you reference/attach/build upon certain supplier requirements.
Hope that helps!
Some equipment have COTS and others have custom software. Please elaborate "you build upon certain supplier requirements".