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The paper presents Grafchart, a graphical programming language for sequential control applications. Grafcahrt has been influenced by Grafcet/SFC and Petri nets. In the paper the relations between Grafchart and Grafcet/SFC and between Grafcahrt and Petri nets are presented and discussed.

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Purpose of this paper: Increasingly more companies need supply chains that satisfy individual needs and can adapt to a changing environment while simultaneously keeping costs down. Hence, flexible and integrated supply chains are needed. The purpose of this paper is to develop a conceptual research platform for studies of how companies can develop such solutions. Design/methodology/approach: A sys

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Disturbances on utilities, such as steam and cooling water, often cause large revenue losses at industrial sites. These disturbances are often hard to handle, since they commonly are plant-wide disturbances that affect more than one production area at the site. Also, the production areas of the site are often dependent on other production areas because of the flow of product through the site, whic