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PERA Reference model: Decision-making and control hierarchy, 1992. Purdue Enterprise Reference Architecture (PERA), or the Purdue model, is a 1990s reference model for enterprise architecture, developed by Theodore J. Williams and members of the Industry-Purdue University Consortium for Computer Integrated Manufacturing.
Purdue Reference Model, “95” provides a model that end users, integrators and vendors can share in integrating applications at key layers in the enterprise. [7] This model influenced the ISA-95 (International Society of Automation) enterprise-control integration standards, [ 8 ] which expanded on the terms of the Purdue Reference Model and ...
The accompanying diagram is a general hierarchical model which shows functional manufacturing levels using computerised control of an industrial control system. Referring to the diagram; Level 0 contains the field devices such as flow and temperature sensors, and final control elements, such as control valves
A process flow diagram describing the construction of a structure chart by a so-called Subject Matter Experts (SME). [2]According to Wolber (2009), "a structure chart can be developed starting with the creating of a structure, which places the root of an upside-down tree which forms the structure chart.
Toy Shop: 1937. Although, we're not sure which story this is, it's clearly one filled with lots and lots of toys. Here, a little girl lovingly points to a baby doll in a window.
A weekend getaway became a nightmare for one couple when biting ants fell from the ceiling onto them as they slept. Here's how to keep it from happening to you.
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Freezer Storage Tips. Since it extends the life of perishable items by weeks to months, “freezer storage is an amazing way to reduce food waste,” explains Gangeri.