June 2007

Special Report: Process/Plant Optimization

Summiting with multivariable predictive control

In a revised paradigm, focus shifts to facilitating the appropriate involvement of all operations stakeholders

Kern, A.G., Tesoro Corp.

  A. G. Kern, Saudi Aramco, Ras Tanura refinery, Ras Tanura, Saudi Arabia       Comments? Write: editorial@HydrocarbonProcessing.com The prevailing paradigm in multivariable control holds that a peak is achieved, in terms of accomplishment and benefits, when a multivariable predictive controller (MPC) is commissioned.Thereafter, benefits tend to slide downhill, depending on the level of monitoring and support. It's been suggested that MPC benefits degrade 100% within two to three years for up to 80% of MPC instances.1 This paradigm dovetails well with several MPC monitoring products now being

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