If a small medical practice develops a list of specific technology required to automate its patient records, this is an example of the stage of the b2b buying process.

I'm not sure if these is a list of choices in this question but here the are following Stages of B2B buying process.
1) A need is recognized
2) A need is described and quantified
3) Potential suppliers are searched for
4) Qualified suppliers are asked to complete responses to requests for proposal (RFPs)
5) The proposals are evaluated and supplier(s) selected
6) An order routine is established
7) A post purchase evaluation is conducted and the feedback provided to the vendor. 

Among these steps, the process where a small medical practice develops a list of specific technology required to automate its patient records falls under the 2nd stage: A NEED IS DESCRIBED AND QUANTIFIED.