To finish this chapter, I’d like to introduce a Tutor and a Pupil in discussion about some of the requirements of a process method. Their dialogue — the first of a number throughout the book — highlights some important principles that underlie Riva.
|Tutor:||When we model something we describe it, and to describe something we need a language. A model uses a limited language — a limited number of concepts — that allows us to say the things we want to say, to describe the things we want to describe. If we wanted to model a nation—s economy, how would we model it?|
|Pupil:||We might capture it in terms of the flow of money between the ...|