Upon one control problem for semiautomated production systems

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A production system includes a deterministic assembly-line and a supplementary production unit to process parts for the line. There are several possible production speeds to process these parts given in the form of stationary stochastic processes. Given the routine control point, the actual accumulated production observed at that point and the deterministic rate of demand, the decision-maker determines both the speed to be introduced and the timing of the next control point. The problem is applied to semiautomated production processes where the advancement of the process cannot be measured or viewed continuously, and the process has to be controlled in discrete points by the decision-maker. Since the cost of performing a single control is relatively high, the control should be carried out as rarely as possible but has to ensure a preset confidence probability of achieving production output no less than that required. Formulae for determining the next control point for an arbitrary distribution function of the stationary process with a certain autocorrelation function are presented. They depend on the status of the system (shortage or surplus), the relation between the rate of demand and the mean value of the speed, the variance of the speed, and on the confidence level 1 - α.
Original languageEnglish GB
Title of host publicationInformation Control Problems in Manufacturing Technology 1989
Number of pages5
StatePublished - 1990


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