COCOMO II.2000 Scale Driver Descriptions

Scale Very Low Low Nominal High Very High Extra High Drivers thoroughly largely Somewhat generally largely thoroughly PREC unprecedented unprecedented unprecedented familiar familiar familiar occasional some general some general FLEX† rigorous relaxation relaxation conformity conformity goals generally mostly RESL‡ little (20%) some (40%) Often (60%) full (100%) (75%) (90%) basically very difficult some difficult largely highly seamless TEAM cooperative interactions interactions cooperative cooperative interactions interactions SW-CMM SW-CMM SW-CMM SW-CMM SW-CMM SW-CMM PMAT Level 1 Lower Level 1 Upper Level 2 Level 3 Level 4 Level 5 or the estimated Process Maturity Level

† degree of required adherence to stated system requirements. ‡ percentage of module interfaces specified subjectively averaged with the percentage of known significant risks mitigated.

Cost Very Low Low Nominal High Very High Extra High Drivers Moderate, low, easily slight easily high risk to RELY recoverable inconvenience recoverable financial loss human life losses losses (DB bytes / 100  D/P DATA Pgm SLOC) 10  D/P < 100 D/P > 1000 < 1000 < 10 CPLX See Table 2.19 across across across RUSE none across project multiple program product line product lines many some correct amount very excessive excessive for DOCU lifecycle needs lifecycle needs for lifecycle for lifecycle lifecycle needs uncovered uncovered needs needs  50% use TIME of available 70% use 85% use 95% use execution time  50% use STOR of available 70% use 85% use 95% use storage major change every 12 mo.; major: 6 mo.; major: 2 mo.; major: 2 wk.; PVOL minor change minor: 2 wk. minor: 1 wk. minor: 2 days every 1 mo. ACAP 15th percentile 35th percentile 55th percentile 75th percentile 90th percentile PCAP 15th percentile 35th percentile 55th percentile 75th percentile 90th percentile PCON 48% / year 24% / year 12% / year 6% / year 3% / year APEX  2 months 6 months 1 year 3 years 6 years PLEX  2 months 6 months 1 year 3 years 6 years LTEX  2 months 6 months 1 year 3 years 6 years strong, mature, simple, Basic strong, mature proactive edit, code, frontend, lifecycle tools, lifecycle tools, lifecycle tools, TOOL debug backend CASE, moderately moderately well integrated little integration integrated integrated with processes, methods, reuse SITE: multi-city and multi-city or same city or same building fully Collo- international multi-company multi-company metro area or complex collocated cation SITE: wide-band wide-band Com- some individual narrow-band electronic elect. comm, interactive muni- phone, mail phone, FAX email communica- occasional multimedia cation tion. video conf. 100% of 130% of 160% of SCED 75% of nominal 85% of nominal nominal nominal nominal