I wasn't only thinking of computer simulations. The word "simulation" is very vague.

It could potentially mean one of:

- Computer Simulation

- Pen & Paper Mathematical models

- Pen & Paper narrative modelling (i.e., writing a paper about different situations and the possible contingency plans - though granted this is not usually referred to as "simulation")

- Role-playing a situation via speech

- Acting out a situation with props and physical movement / simulated limited communication

- Sending out simulated broadcasts ("this is only a test")

- Sending out false but believable broadcasts

- Infecting the public with a (hopefully less harmful) disease in order to gauge response.