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State Models for Jobs and Job Supervisors



David Flater, Edward J. Barkmeyer Jr., Evan K. Wallace


Intelligent control of discrete parts manufacturing jobs and machinery requires state models for the jobs and the controllers. Different approaches to control have yielded different state models. While a dominant model is yet to emerge, the advantages and shortcomings of the existing models suggest some design principles for future efforts; most importantly, the demarcations between the shop level of control and the workcell level, and between the job, the lot, the controller, and the machine, should be wee-defined.
NIST Interagency/Internal Report (NISTIR) - 6037
Report Number


automata, control, manufacturing


Flater, D. , Barkmeyer Jr., E. and Wallace, E. (1997), State Models for Jobs and Job Supervisors, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed March 3, 2024)
Created May 31, 1997, Updated October 12, 2021