This summary contains in depth concepts, explanations and examples which will not only allow you to reduce the amount of time you have to study, but will also assist you with getting a distinction for this module. You won’t even have to open your prescribe book! The following concepts are covered...
Note: This summary consists out of an application and
theory part.
Application
COCOMO
It is a cost estimation model that was built around an equation. Equation is
Boehm’s equation.
The equation:
Effort = c*(size)^k
Variables in Boehm’s equation:
Effort: measured in person months consisting of 152 working hours (1 mark)
Size: measured in thousands of delivered source code instructions (kdsi) (1
mark)
c and k are constants:
The constants, c and k, depend on whether the system could be classified, in Boehm’s
terms, as “organic”, “semi-detached” or “embedded”
,Note: Float is the slack time, i.e. the time there is available to wait.
Thus the critical path will be where all the Float’s os 0. Thus critical path is
A->B->E->G->I->J.
Non critical activities are the one’s which float is not 0. i.e. C, D, F and H.
To calculate duration of critical path just add all durations of activities in the
critical path. Duration = 4+ 2+5+6… = 31
Note critical path duration will be the most (more than other paths).
Activity-on-arrow
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