A resource or collection of resources, commonly people or machines, where an operation or set of operations is performed. For example, simulation-based design may be modeled as a process center in the design process. In fabrication, welding may be a process center. A piping crew may be modeled as a process center on a construction project. In fixed site production processes, such as construction of a building, the process centers move through the work site. In traditional production, entities move through the process center. Process centers are also known as stations.