ASTM E1946 - 18

    Standard Practice for Measuring Cost Risk of Buildings and Building Systems and Other Constructed Projects

    Active Standard ASTM E1946 | Developed by Subcommittee: E06.81

    Book of Standards Volume: 04.11


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    Significance and Use

    5.1 Measuring cost risk enables owners of buildings and other constructed projects, architects, engineers, and contractors to measure and evaluate the cost risk exposures of their construction projects.3 Specifically, cost risk analysis (CRA) helps answer the following questions:

    5.1.1 What are the probabilities for the construction contract to be bid above or below the estimated value?

    5.1.2 How low or high can the total project cost be?

    5.1.3 What is the appropriate amount of contingency to use?

    5.1.4 What cost elements have the greatest impact on the project’s cost risk exposure?

    5.2 CRA can be applied to a project's contract cost, construction cost (contract cost plus construction change orders), and project cost (construction cost plus owner's cost), depending on the users’ perspectives and needs. This practice shall refer to these different terms generally as “project cost.”

    1. Scope

    1.1 This practice covers a procedure for measuring cost risk for buildings and building systems and other constructed projects, using the Monte Carlo simulation technique as described in Guide E1369.

    1.2 A computer program is required for the Monte Carlo simulation. This can be one of the commercially available software programs for cost risk analysis, or one constructed by the user.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E631 Terminology of Building Constructions

    E833 Terminology of Building Economics

    E1369 Guide for Selecting Techniques for Treating Uncertainty and Risk in the Economic Evaluation of Buildings and Building Systems

    E1557 Classification for Building Elements and Related SiteworkUNIFORMAT II

    E2083 Classification for Building Construction Field Requirements, and Office Overhead & Profit

    E2103/E2103M Classification for Bridge Elements--UNIFORMAT II

    E2168 Classification for Allowance, Contingency, and Reserve Sums in Building Construction Estimating

    E2514 Practice for Presentation Format of Elemental Cost Estimates, Summaries, and Analyses


    ICS Code

    ICS Number Code 91.010.20 (Contractual aspects)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/E1946-18

    Citation Format

    ASTM E1946-18, Standard Practice for Measuring Cost Risk of Buildings and Building Systems and Other Constructed Projects, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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