In the Movement Model the physical structure of the offshore installation is represented using a hexagonal cellular grid. Personnel are represented using cellular automata which can move about the plan from cell to cell. Movement algorithms determine which cell each automaton should occupy at any given time and move the automata accordingly. The movements and interactions of the automata on the cellular grid simulate the movements and physical interactions of people on a platform.
Among the tools provided for creating and modifying scenarios are the Plan Editor which allows the user to define physical structures, such as walls, equipment, etc., using different types of cells, and a Scenario Editor which allows the user to specify the hazard, how it escalates, and its effect on the structure over time. For example, the location of and intensity of smoke can be specified at a number of time steps. Automata are created using a Population Editor.