(taken from http://www.rfp-templates.com/How-to-Write-an-Executive-Summary.html)
Executive Summary definition: An Executive Summary is, basically, anything but a product presentation, and nothing but a sales pitch. Far more than an abstract merely presenting the rest of the proposal, it’s your unique opportunity to convince the reader that your proposal provides the best value proposition: the best benefit at the lowest cost. The more technical your proposal, the more critical the executive summary is likely to be.
Given the proposal cover letter is not part of the proposal per se, the executive summary remains the most important section of your proposal. Keep in mind the executive summary is the only part of your proposal that will be read by each and any member of the decision panel, if any. More important, experience tells you in reality that it’s the only part that an executive, a person who has the definitive power over the final decision, will read from your proposal.
Use the executive summary template and sample to create your own executive summary from a template.
To stand out from your competitors, read Abstract vs. Executive Summary: Discover The Main Differences.