The largest oil and natural gas producer in the EU, the United Kingdom retains proven crude oil reserves of around 4 billion barrels and proven natural gas reserves of some 18.8 Tcf as of 2006. Containing the bulk of domestic reserves and an extensive network of subsea pipelines and infrastructure, the UK Continental Shelf (UKCS) is the most active offshore region for the UK's oil and gas sector, and industry giants Shell, ExxonMobil, Chevron and Total all explore and produce there. The third largest global energy company and headquartered in the UK, BP is operator of such major offshore UK producers as the Foinaven and Forties fields.
Projects have numerous activities that need to be planned and scheduled properly so that they may be completed on time. Planning identifies what activities are required whilst scheduling determines the sequence of these activities. Planners and Schedulers manage work priorities, schedules, work orders and plan revisions once there are design changes, unavailability of materials or services and other project disruptions. They typically use project controls and project management software to manage these functions.