Auditing the contingency plan

Interaction tests should be performed when a comp lex comb ina t i on of app l i ca t ion env i ronmen ts , ope ra t i ng sys tems and communicat ion protocols exist around a business application. These tests can take the form of modifying avalue supplied by a base layer to an application layer and monitoring the response of the application. For example, if an application receives encryption services from the operating system, the reaction of the application to a key management failure should be tested.