Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10DeMarco’s Bang MetricBy William Lord & Jason C. SlaughterPrimitives•Functional primitives (FuP)•Data elements (DE)•Objects (OB)•Relationships (RE)•States (ST)•Transitions (TR)•Modified manual functional primitives (FuPM)•Input data elements (DEI)•Output data elements (DEO)•Retained data elements (DER)•Data tokens (TCi)•Relationship connections (REi)Primitives•Functional primitives (FuP)•Objects (OB)•Relationships (RE)•Data tokens (TCi)•Relationship connections (REi)Only the following primitives are used in the calculation of DeMarco’s bang metric.Data-StrongAll ProjectsScientific CommercialFunction-StrongHybridDistribution of Software ApplicationsApplication ClassificationRE/FuP < 0.7 Function-Strong ApplicationRE/FuP > 1.5 Data-Strong Application midrange indicates HybridFunction-strong algorithmSet initial value bang = 0do while functional primitives remain to be evaluatedcompute token-count for primitive icompute corrected FuP increment (CFuPI)allocate primitive to classassess class and note weightmultiply CFuPI by assessed weightbang = bang + weighted CFuPIenddoPrimitve ClassificationClass Weight Class Weightseparation 0.6 synchronization 1.5amalgamation 0.6 output generation 1.0data direction 0.3 display 1.8simple update 0.5 tabular analysis 1.0storage management 1.0 arithmetic 0.7edit 0.8 initiation 1.0verification 1.0 computation 2.0text manipulation 1.0 device management 2.5Function-strong algorithmSet initial value bang = 0do while functional primitives remain to be evaluatedcompute token-count for primitive icompute corrected FuP increment (CFuPI)allocate primitive to classassess class and note weightmultiply CFuPI by assessed weightbang = bang + weighted CFuPIenddoData-strong Algorithmset initial value bang = 0do while objects remain to be evaluated in data modelcompute count of relationships for object icompute corrected OB increment (COBI)bang = bang +
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