measurement embedded SW

[Efim Monyak]

Hello all,

if a bottom-up estimation method is used, then the system will be
brocken into a different modules. The function points will be counted
for any modul and the sum of function points for all modules will be
used to measure a complete system.

Take an example system:
it contains one button, one display and one ADC. The ADC is a part of
the same hardware.
It works very simple: if a button is pressed the data will
be read from ADC and displayed.

It is possible to say: the system has one EQ. In this case the part of
software which controll ADC is ignored.
It is also possible to say: the system has two modules. One works with
button and display and other controlls the ADC. In this case we have
two modules and each of whem has one EQ. The complete system has also
two EQs.
The number of function points is different depend on measurement
method.

Can anybody explain what is hier false?
Is it not alowed for function points to measure the parts of system
which don't direct communicate with user?

Thanks

[Mon]

Hi Efim,
Your question touches on the reason why there are several functional size
measurement methods. Each has its strengths, and for the type of software
you mention, probably COSMIC-FFP would be more suitable. The basic concepts
of functional size measurement are much the same (see IS 14143-1:1998), but
COSMIC addresses the question of measuring layered software. The measurement
manual is available free to download, from www.cosmicon.com (and follow the
links).
M. O'Neill
Software Management Methods
Dublin
Efim Monyak <ymonyak@lipowsky.de> wrote in message
news:3F0AEFDD.CDD52AA3@lipowsky.de... Hello all, if a bottom-up estimation method is used, then the system will be brocken into a different modules. The function points will be counted for any modul and the sum of function points for all modules will be used to measure a complete system. Take an example system: it contains one button, one display and one ADC. The ADC is a part of the same hardware. It works very simple: if a button is pressed the data will be read from ADC and displayed. It is possible to say: the system has one EQ. In this case the part of software which controll ADC is ignored. It is also possible to say: the system has two modules. One works with button and display and other controlls the ADC. In this case we have two modules and each of whem has one EQ. The complete system has also two EQs. The number of function points is different depend on measurement method. Can anybody explain what is hier false? Is it not alowed for function points to measure the parts of system which don't direct communicate with user? Thanks