Abstract: A method to electronically create, store, validate, exercise with and view dynamic Emergency Response Plans (ERP) is provided. The system employs a local computer-based constructive simulation application (100, 200) or a server-based constructive simulation tool (300) that stores all information related to and ERP in a database (600) in a manner such that it can be visually edited (400), dynamically shown on screen (500), stored and transmitted to other users in a self-contained file format (600), and can be used in a networked exercise (550) where players can take control of assigned entities within the simulation of the ERP.