Accept the need as defined in the RFP and study the various ways in which your company can satisfy that need.

In the short term, this is the safest approach to take. Bid on the job as it's been described, try to win it, and then hope you can convince the client to alter the statement of work after you have the contracts in your pocket. Unfortunately,what's safe in the short term is risky in the long. You're basing the business relationship from the outset on less than full honesty,and a tough Customer who is looking for performance guarantees or service-level commitments may not be willing to approve change documents or authorize additional funding to get a solution that works.