ABSTRACT
Once goals and ob ject ives are defined, the model development process
proceeds through a sequence of phases, more or le s s lo g i c a l l y ordered.
For a sp ec if ie d model development-that i s , a development program
spelled out under co ntract-there are s ix major phases or steps :
Conceptualization,
Functional Representation,
Computational Representation,
C a l ib ra t io n ,
V e r i f ic a t io n ( S e n s i t i v i t y ) , and
Documentation.
