Standard Practice for Measuring Cost Risk of Buildings and Building Systems and Other Constructed Projects
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.”
1.1 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.
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