TY - CONF AU - Flater, David AU - Jr., Edward Barkmeyer AU - Wallace, Evan C2 - In Proceedings of the 1999 ASME Design Engineering Technical Conferences, Las Vegas, NV, USA DA - 1999-09-01 00:09:00 LA - en PB - In Proceedings of the 1999 ASME Design Engineering Technical Conferences, Las Vegas, NV, USA PY - 1999 TI - Towards Unambiguous Specifications: Five Alternative Job Control Models for An Object-Oriented, Hierarchical Shop Control System ER -