• Only consider sustaining existing 50MLOC of DoD Ada warfighting software - Excludes current and future development

• Only 8 percent of software changes per year (usually 11-20 percent)

• Only $40 per changed line of code (usually over $75)

• Only 8 percent cost improvement from $15M investment in tools and experience
  - Cost models include other factors, higher percentages

• Cost without investment = (50 MLOC) (0.08 change/year) ($40) = $160M/yr

• Cost with investment = ($160M/yr) (0.92) (0.92) = $135M/yr

• Annual ROI = ($160M-$135M)/ $15M = 1.67