Hello @ChristineFiorentino
Something I would do is create a custom form like Vendor Selection overview. That can have some sort of overview options like what stage are you at in the process. You can then use Fusion to check that option and when it changes add a custom form for that stage so have a custom form for:
researching potential vendors
defining the project and gathering requirements,
developing selection criteria
creating a Request for Proposal (RFP)
Etc
Whatever your process looks like. Then you could have a trail of custom forms that show your full process and will be reportable on. Would take some time to finalise each custom form at each stage with the questions your team want answered etc but after abit of time and iterations you could have a very nice audit of the vendor selection process.
Reach out if you need more help or if you don't have fusion there are other ways.
Good luck