Managing a SAAS / cloud implementation is different from new software development and from software upgrade and maintenance projects. There are certain things to be aware of and to manage differently to ensure success.
If you are involved with an initiative early on, prior to the Statement of Work (SOW) being signed and even as early as part of the RFI / RFP process, you may want to consider aspects beyond software functionality when comparing providers, such as the level of documentation, testing, integration options, and performance. Involving other project specialists in the process early can yield even greater returns. A test lead may point out concerns around how defects will be handled after go-live, a system architect may ask if the solution integrates with your ERP, and a business analyst may ask how certain non-functional requirements, such as availability, are met.