despite the fact that it has become a fundamental variable for organizational design very few studies have been done to explore this vital issue in a systematic and convincing fashion. indeed, the small amount of information and few theories available on organizational design in general and much less on the effects of it on organization design is surprising. most studies on the effects of it on...

Plant-wide oscillations are common in many processes. Their effects propagate to many units and may impact the overall process performance. It is important to detect and diagnose the cause of such oscillations in order to rectify the situation and maintain the proper profitability of the plant. This paper proposes a new procedure to detect and diagnose plant-wide oscillations using routine oper...

Modeling support for dynamic simulation of chemical-process flowsheets, which is of significant ®alue for plantwide dynamic simulation using differential ] algebraic model formulations, is to date ®ery limited when one or more unit models include partial differential equations. Se®eral new techniques that pro®ide modeling support for such simulations are presented. These techniques are based on...

We consider control structure selection, with emphasis on “what to control”, for a simple plant with a liquid-phase reactor, a distillation column, and recycle of unreacted reactants. Plants of this kind have been studied extensively in the plantwide control literature. Our starting point is a clear definition of the operational objectives, constraints, and degrees of freedom. Active constraint...