Work centre configuration and capability details can be accessed and referenced from within the SmartPlans that engineers create using Manufacturing Angel® and can be updated easily with the user's own methods and metrics. Work centre definitions can include parametric numeric data such as working envelope, accuracy and repeatability etc. or parametric textual data such a method descriptions, process specifications, operator instructions etc. In addition the work centre definitions can contain combined parametric method descriptions and parametric time/cost calculation blocks in the form of work centre tasks and sub-tasks. The format, organisation and content of information held in work centre definitions can be customised to the users requirements.