<P> Another form involves a single representative from each of several teams . Typically, participants work through simple scenario and then discuss specific aspects of the plan . For example, a fire is discovered out of working hours . </P> <P> The exercise consumes only a few hours and is often split into two or three sessions, each concentrating on a different theme . </P> <P> A medium exercise is conducted within a "Virtual World" and brings together several departments, teams or disciplines . It typically concentrates on multiple BCP aspects, prompting interaction between teams . The scope of a medium exercise can range from a few teams from one organisation co-located in one building to multiple teams operating across dispersed locations . The environment needs to be as realistic as practicable and team sizes should reflect a realistic situation . Realism may extend to simulated news broadcasts and websites . </P> <P> A medium exercise typically lasts a few hours, though they can extend over several days . They typically involve a "Scenario Cell" that adds pre-scripted "surprises" throughout the exercise . </P>

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