Methods and systems for seamlessly integrating an end-to-end acquisition process using a flexible data structure are disclosed. A flexible data structure consistent with these methods and systems may connect the buyer's requirement to the vendor's proposed solution, facilitating a requirement-by-requirement evaluation process allowing buyers to evaluate content as well as price of a proposal. Embodiments of the present invention standardize the format of proposals, allowing buyers to more easily compare vendors' proposals side-by-side. Still other embodiments of the present invention produce an error checking report to further aid vendors in improving proposals and buyers in evaluating proposals.