Gio Wiederhold PDM 10
4. Causes provide the leverage
Language
of analyst / Language of modeling
•Many causes -- independent variables
–A few
may be controllable
–Some
may be controlled by our competition
–Others
are forces-of-nature
•Even more effects -- dependent
variables
–A few
may be desired
–Some
may be disastrous
–Many
are poorly understood
•Intermediate effects
–Provide
a means for measuring effectiveness
–Allow
correction of actions taken