“…Many policies will also contain some restrictions or guards confining the rule action to appropriate occasions. This event-conditionaction (ECA) format is standard for rule-based adaptation systems [4,5,6,8,9,16,19,33,34,35,36,40], where an adaptation management system is responsible for monitoring these events, evaluating the conditions and initiating the management action on the targeted managed object. In a policy-based dynamic adaptation system it should be possible to edit the rule set and have them re-interpreted to support the dynamic addition of new rules or changes in policy.…”