JAN-FEB 2019

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INTECH JANUARY/FEBRUARY 2019 13 PROCESS AUTOMATION have had their own domains, responsibilities, and ways of doing things. IT responsibilities center around corporate functions and business applications. Technologies and platforms need to stay up to date so the latest cybersecurity and enterprise analytical tools can be used. OT responsibilities concentrate on keeping manufacturing running safely, reliably, and efficiently. Technology can bring a variety of benefits, but there needs to be a good reason to change something that works. Setting priorities The responsibilities of network managers of all stripes have been defined by three main areas of concern, which can be arranged into "triads" indicating relative levels of priority (figure 1). 1. network availability 2. system integrity 3. data confidentiality IT managers tend to stress number three as paramount because of the criticality and sensitivity of company and customer data. System integrity is important to maintain, but if it is necessary to interrupt network availability to install a patch or make some other modification, it can be done within reason. Some contend this characterization is an oversimplification. They point out how availability can be enormously important for networks handling financial transactions and the like, but even these types of networks can be shut down for extended periods after hours and on weekends. OT managers, on the other hand, do gener- ally stress number one above the others, al- though two and especially three are not the distant followers they once were. Availability is necessary to keep production running, which is clear enough. Maintaining a high degree of system integrity is necessary to support avail- ability, so those two priorities are linked. Data confidentiality and cybersecurity long took a back seat. It was assumed, or at least hoped, that the relative isolation and propri- etary peculiarities of manufacturing networks provided some protection—the old security- by-obscurity argument. The data that could be captured by a hacker would be effectively indecipherable anyway. This has changed with FAST FORWARD l IT and OT personnel have often been at odds in process manufacturing plants and facilities. l Industry 4.0 and the IIoT force IT and OT to work together, which can be difficult. l New tools and techniques foster improved working relationships between the two groups.

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