1.1 This practice provides a recommended procedure for calculating and applying the payback method in evaluating building designs and building systems.
1.2 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.
ASTM E1121-15(2020)e1 Referenced Document
ASTM E1057 Standard Practice for Measuring Internal Rate of Return and Adjusted Internal Rate of Return for Investments in Buildings and Building Systems
ASTM E1074 Standard Practice for Measuring Net Benefits for Investments in Buildings and Building Systems
ASTM E1185 Standard Guide for Selecting Economic Methods for Evaluating Investments in Buildings and Building Systems
ASTM E1369 Standard Guide for Selecting Techniques for Treating Uncertainty and Risk in the Economic Evaluation of Buildings and Building Systems
ASTM E631 Standard Terminology of Building Constructions
ASTM E833 Standard Terminology of Building Economics*, 2024-04-22 Update
ASTM E917 Standard Practice for Measuring Life-Cycle Costs of Buildings and Building Systems
ASTM E964 Standard Practice for Measuring Benefit-to-Cost and Savings-to-Investment Ratios for Buildings and Building Systems
ASTM E1121-15(2020)e1 history
2020ASTM E1121-15(2020)e1 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2015ASTM E1121-15 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2012ASTM E1121-12 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2007ASTM E1121-07e1 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2007ASTM E1121-07 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2002ASTM E1121-02 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
1998ASTM E1121-98 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems