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Metrics (Primary metrics (Secondary metrics are built on top of the…
Metrics
Primary metrics
lines of code
LOC line of code
KLOC thousand line of code
is a product metric
Function point
product metric
person-months
measurement of personnel effort
output of one person in one month
project metrics
Secondary metrics
are built on top of the primary metrics
productivity
KLOC / PM
FP / PM
Cost
$/ LOC
$/ FP
Documentation
pages of doc /KLOC
pages of doc/ FP
Quality
defects/KLOC
defects/ FP
software quality metrics
end-product quality
in process quality
product metrics
the development processes
development time
defect removal
time to fix error
process metrics
describe the characteristics of the product like
size
complexity
quality
project metrics
management of projects
HR
cost
time
schedule
productivity
reliability metrics
Quality and reliability metrics
MTBF = MTTF + MTTR
where
MTBF = mean time between failure
MTTF = mean time to failure
MTTR = Mean time to repair
Software Availability
probabilithy that a program executes correctly at a given point in time
AVAIL = [MTTF/(MTTF + MTTR)] X 100%
Defect rate
defects/ KLOC or defects /FP
REL = ( failure-free execs ) / Total Executions)
(total Execs - failed Execs) / (total execs)
Fq = (c1 x m1) + (c2 x m2) + ...
McCall
Problems per User month
(number of problems reported by user) /[(number of licenses) X (number of months)]
(defects removed during a development phase)/ (defects latent in the product)
Defect Removal Effectiveness (DRE)
( number of problems closed during month)/ (number of problem arrivals during month)
Backlog Maintenance Index (BMI)
Numeric measurements