Volume, cost and time estimation Excel spreadsheet tool originally developed by the EDRM Metrics IV group. Made available since this tool is no longer available as source material on the EDRM Duke site. It was the principal work product of Greg Buckles, Eric Derk and Jack Halprin. Although some of the assumptions are dated, the UTMBS codes are still valid and the formulas are all unlocked for your modification and use under Creative Commons license. For security reasons, .XLMS Excel files must be downloaded as a .ZIP file and locally extracted.