Cocomo Manual

COCOMO II Model Definition Manual

Version 2.1 © 1995 – 2000 Center for Software Engineering, USC

Table of Contents
Acknowledgements .........................................................................................................................ii Copyright Notice............................................................................................................................iii Warranty.........................................................................................................................................iii 1. Introduction ............................................................................................................................... 1 1.1Overview.......................................................................................................................... 1 1.2 Nominal-Schedule Estimation Equations ........................................................................ 1 2. Sizing......................................................................................................................................... 3 2.1 Counting Source Lines of Code(SLOC)......................................................................... 3 2.2 Counting Unadjusted Function Points (UFP) .................................................................. 4 2.3 Relating UFPs to SLOC................................................................................................... 6 2.4 Aggregating New, Adapted, and Reused Code ............................................................... 7 2.5 RequirementsEvolution and Volatility (REVL) ........................................................... 12 2.6 Automatically Translated Code ..................................................................................... 13 2.7 Sizing Software Maintenance ........................................................................................ 13 3. Effort Estimation..................................................................................................................... 15 3.1 Scale Factors .................................................................................................................. 16 3.2 Effort Multipliers ........................................................................................................... 25 3.3 Multiple Module Effort Estimation............................................................................... 39 4. Schedule Estimation................................................................................................................ 41 5. Software Maintenance............................................................................................................. 42 6. COCOMO II: Assumptions and phase/activitydistributions.................................................. 44 6.1 Introduction.................................................................................................................... 44 6.2 Waterfall and MBASE/RUP Phase Definitions ............................................................ 45 6.3 Phase Distribution of Effort and Schedule.................................................................... 49 6.4 Waterfall and MBASE/RUP Activity Definitions......................................................... 53 6.5 Distribution of Effort Across Activities ........................................................................ 61 6.6 Definitions and Assumptions......................................................................................... 66 7. Model Calibration tothe Local Environment ......................................................................... 68 8. Summary ................................................................................................................................. 71 8.1 Models ........................................................................................................................... 71 8.2 Rating Scales...