COCOMO II.2000 Scale Driver Descriptions
Scale
Drivers
Very Low
Low
Nominal
High
Very High
Extra High
PREC
thoroughly
unprecedented
FLEX†
rigorous
largely
unprecedented
occasional
relaxation
Somewhat
unprecedented
some
relaxation
little (20%)
some (40%)
Often (60%)
largely
familiar
some
conformity
mostly
(90%)
thoroughly
familiar
general
goals
RESL‡
generally
familiar
general
conformity
generally
(75%)
TEAM
very difficult
interactions
PMAT
SW-CMM
Level 1 Lower
basically
largely
highly
cooperative
cooperative cooperative
interactions
SW-CMM
SW-CMM
SW-CMM
SW-CMM
Level 1 Upper
Level 2
Level 3
Level 4
or the estimated Process Maturity Level
some difficult
interactions
full (100%)
seamless
interactions
†
degree of required adherence to stated system requirements.
percentage of module interfaces specified subjectively averaged with the percentage of known
significant risks mitigated.
‡
© 1999-2000 USC Center for Software Engineering. All Rights Reserved
612916866
SW-CMM
Level 5
COCOMO II.2000 Post-Architecture Cost Driver Descriptions
Cost
Drivers
Very Low
Low
Nominal
High
Very High
RELY
slight
inconvenience
low, easily
recoverable
losses
Moderate,
easily
recoverable
losses
high
financial loss
risk to
human life
(DB bytes /
Pgm SLOC)
< 10
10  D/P < 100
100  D/P
< 1000
D/P > 1000
DATA
CPLX
See Table 2.19
RUSE
DOCU
many
lifecycle needs
uncovered
none
across project
some
lifecycle needs
uncovered
correct amount
for lifecycle
needs
 50% use
of available
execution time
 50% use
of available
storage
TIME
STOR
PVOL
across
product line
excessive for
lifecycle needs
very excessive
for lifecycle
needs
70% use
85% use
95% use
70% use
85% use
95% use
major change
every 12 mo.;
minor change
every 1 mo.
35th percentile
35th percentile
24% / year
6 months
6 months
6 months
major: 6 mo.;
minor: 2 wk.
major: 2 mo.;
minor: 1 wk.
major: 2 wk.;
minor: 2 days
55th percentile
55th percentile
12% / year
1 year
1 year
1 year
75th percentile
75th percentile
6% / year
3 years
3 years
3 years
90th percentile
90th percentile
3% / year
6 years
6 years
6 years
strong, mature,
proactive
lifecycle tools,
well integrated
with processes,
methods, reuse
15th percentile
15th percentile
48% / year
 2 months
 2 months
 2 months
TOOL
edit, code,
debug
simple,
frontend,
backend CASE,
little integration
Basic
lifecycle tools,
moderately
integrated
strong, mature
lifecycle tools,
moderately
integrated
international
multi-city and
multi-company
multi-city or
multi-company
same city or
metro area
same building
or complex
some
phone, mail
individual
phone, FAX
narrow-band
email
75% of nominal
85% of nominal
100% of
nominal
wide-band
electronic
communication.
130% of
nominal
wide-band
elect. comm,
occasional
video conf.
160% of
nominal
SCED
© 1999-2000 USC Center for Software Engineering. All Rights Reserved
across
multiple
product lines
across
program
ACAP
PCAP
PCON
APEX
PLEX
LTEX
SITE:
Collocation
SITE:
Communication
Extra High
612916866
fully
collocated
interactive
multimedia