This signals to evaluators that the supplier is not really prepared to meet the requirements the customer has made. The evaluators surveyed said they didn't read alternate proposals thoroughly, if at all. Of course, if the customer has specifically asked for an alternative to the solution called out in the RFP, then by all means, supply one. But for the most part, if you have waited until you write the proposal to give an alternative solution, then you are way too late. Do it sooner, months before the RFP drops.
Evaluators like to see contract deliverable items .
Many customers both in and out of the government don't, however, and including the contract deliverables tells the evaluators that you know exactly what the contract requires and what you're on the hook to deliver. By back-up material they mean technical data not specifically called out in the proposal but that supports your case. Not many thought marketing literature was very helpful. Proposals that are too wordy. Poor response to RFP requirements 4.