A core Course on Modeling Introduction to Modeling 0LAB0 0LBB0 0LCB0 0LDB0 S.2
To find the purpose of something, pretend that it is absent: what can no longer be done?
Summary: Every model has a purpose The purpose of model X for system Y: That what cannot be done or known with respect to Y if X is absent To find this purpose, first ask who will benefit and why.