Effective use of the Quality Plan relies on an ability to link to various triggers. These triggers are usually expected dates or unexpected events. Totally unexpected events are those not normally shown on any plan. Totally unexpected events are those not normally shown on any plan. A good Quality Plan will show quality in the context of the whole project. Change control is something many projects seem to just arrive at without overtly planning how changes will be managed. A fundamentally important consideration for change control is communication. Configuration management is the control of the blueprint of project deliverables, from their design through to construction and eventual implementation. The Quality Plan needs to state the measurement requirements: what measurements are appropriate, who is going to undertake the measurements, where and when. Earned value is a technique that shows how much has been “earned” by the completion of project tasks against a baseline budget and schedule.