Savings-to-Investment Ratio (SIR) : Either the ratio of present value savings to present value investment costs, or the ratio of annual value savings to annual value investment costs
Robert E. Chapman and Douglas S. Thomas, A Guide to Printed and Electronic Resources for Developing a Cost-Effective Risk Mitigation Plan for New and Existing Constructed Facilities, Glossary of Related Terms & Acronyms and Abbreviations, U.S. Department of Commerce Technology Administration National Institute of Standards and Technology, Office of Applied Economics Building and Fire Research Laboratory (NISTIR 7390), MD, USA 2007. http://fire.nist.gov/bfrlpubs/build07/PDF/b07011.p df, (Rsk Anlys and Mgt Procss - Amer) {986}
