Constructive Cost Model (COCOMO)

COCOMO II Models:

• Application-Composite Model:
  • ManMonth = \frac{NumOfApplicationPoint * (1 - ResueRatio))}{Productivity}

• Early Design Model:
  • Effort = A * Size^{B} * M \newline ManMonth = 2.94 * Size^{1.1 .. 1.24} * M \newline M = PersonnelRelated * ProductRelated * ProjectRelated \newline PersonnelRelated = PersonnelCapability * PersonnelExperience \newline ProductRelated = ProductReliabilityComplexity * ReuseNeeded * PlatformDifficulty \newline ProjectRelated = SupportFacility * Schedule \newline

• Reuse Model:
  • ManMonth_{Auto} = \frac{TotalLinesOfCode * ReuseRatio}{Productivity} \newline TotalLinesOfNewCode = TotalLinesOfCode * AdaptationAdjustmentMultiplexer \newline AdaptationAdjustmentMultiplexer = Adaptation + Understanding + Assessment \newline TotalLinesOfNewCode_{Adapted} = TotalLinesOfNewCode * (1 - AdaptedRatio)

• Post-Architecture Model:
  • ManMonth = A * Size^{B} * M \newline B = 1.01 + \frac{\sum_{i=1}^{5}Factor_i}{100} \newline 0 <= Factor_i <= 5 \newline Factor = [Precedeness, DevelopmentFlexibility, ArchitecturalRiskResolution, TeamCoesion, ProcessMaturity] \newline

Development Project Duration:

ProjectDuration = 3 * ManMonth^{(0.33 + 0.2 * (B - 1.01))}

References:

• Cost Estimation with COCOMO II