Manufacturing Angel® includes functionality to create manufacturing methods and estimates which can be updated automatically with changes to product requirements or manufacturing configuration. These are referred to as 'SmartPlans'. Operator instructions can be input directly or can be built up from the pre-defined standard methods of the company.They can include references to parametric numeric data such as working envelope, accuracy and repeatability etc. or to parametric textual data such a method descriptions, process specifications, operator instructions etc. In addition the operator instructions can contain combined parametric method descriptions and parametric time/cost calculation blocks in the form of product or work centre related tasks and sub-tasks.