How to Evaluate the Proposal and the Performance of Consulting Vendors

I have read, understood and accepted Gartner Separate Consent Letter , whereby I agree (1) to provide Gartner with my personal information, and understand that information will be transferred outside of mainland China and processed by Gartner group companies and other legitimate processing parties and (2) to be contacted by Gartner group companies via internet, mobile/telephone and email, for the purposes of sales, marketing and research.