Dictionary of Procurement Terms

Welcome to the NIGP Online Dictionary of Procurement Terms, the comprehensive reference for public purchasing terms and concepts.

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  • Alternative Project Delivery Method (APDM )

    A collective term to refer to the use of non-traditional construction contracting methods. The contractor may participate in or advise on the design or may be entirely responsible for the design; the contractor's selection is based on qualifications or best value. Traditional contracting methods may include design-bid-build or design-build where alternative methods may include construction management or an alliance/relationship contracting.
  • Ambiguity

    Contract language that can be construed to have more than one meaning, definition, or interpretation.
  • Amendment

    An agreed addition to, deletion from, correction, or modification of a document or contract.
  • Amendment Previous Value

    CANADIAN Value of a document as last amended.
  • Amendment Status

    CANADIAN Identifies the number and description of amendments issued to a solicitation or contract, and gives a description of the previous wording.
  • American Arbitration Association (AAA)

    A not-for-profit organization that provides resources for Alternative Dispute Resolution (ADR).
  • American Bar Association (ABA)

    Founded in 1878, the ABA is committed to advancing the rule of law across the United States and beyond by providing practical resources for legal professionals, law school accreditation, model ethics codes and more. (ABA, 2020)
  • American Institute of Architects (AIA)

    Headquartered in Washington, D.C., and with more than 95,000 members and 200 chapters around the world, the AIA advocates for the value of architecture and gives architects the resources they need to do their best work. The AIA's work drives positive change through the power of design. (AIA, 2020)
  • American National Standards Institute (ANSI)

    The American National Standards Institute oversees standards and conformity assessment activities in the United States. (ANSI, 2020)
  • American Production and Inventory Control Society (APICS)

    Professional association for supply chain and operations management and the leading provider of research, education and certification programs that elevate supply chain excellence, innovation and resilience. (APICS, 2015)