See if the data repository is robust and scalable enough to meet your current and future requirements.

Determine what kind of content you have and what kinds you expect the vendor to supply.

Use the interface. Is it clear and concise? Will your users be able to navigate it and accomplish their tasks easily?

Learn how much integration will be required. Will you have to use in-house or third-party developers?

Decide how much you can do on your own and where you may need professional services.