A production equipment is a specialization of a saref:Device and s4bldg:PhysicalObject that can produce items in a manufacturing process. This class represents an individual production equipment device and includes their specification in terms of functions, states and services. Different types of machines can be defined under this class as needed, for example, LaserCuttingMachine (i.e., a type of production equipment to cut steel material), MillingMachine (i.e., to drill holes in steel material), MouldingMachine (i.e., to mold liquid material, such as iron or plastic, and let it harden in a certain shape), WeldingMachine (i.e., join parts of material, such as steel, together), etc.