A method, and corresponding computer program product and system, defines and uses marker points within a modeled manufacturing process routing that includes multiple sequenced operations. The method includes receiving user input that defines one or more marker points within the modeled manufacturing process routing and between sequential ones of the operations. The marker points define a user-defined point within a manufacturing process and include one of multiple defined types that each define a different use to be made by the marker point. The method also includes detecting if any marker points of a specified one of the defined types have been defined in the manufacturing process routing. If a marker point having the specified one of the defined types is detected, a predefined computing function is executed that uses the detected marker point.