A contract modification is a written change to an existing contract. Bilateral (signed by both parties) or unilateral (signed only by CO). Types: administrative (no cost/scope change), supplemental agreement (mutual), and change order (unilateral within scope).
is a process concept federal contractors and grant writers run into across solicitations, regulations, and award filings
Modification is a step or workflow in the federal-procurement lifecycle. Knowing where Modification fits in the larger acquisition arc — from market research through award through performance — helps contractors time their engagement, identify the right contracting officials, and avoid showing up too late to influence the requirement. Many proposal failures trace back to misunderstanding when Modification occurs, who owns it, and what artifacts it produces. The related terms above name the adjacent process steps that most commonly precede or follow Modification, and tracking those transitions over time is one of the more reliable ways to build pipeline visibility ahead of formal solicitations.
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