October 2010

Special Report: Process Control and Information Systems

Increase your margin by 25%

Here’s how to make sure that the planning LPs always match the plant

Korchinski, W., Advanced Industrial Modeling Inc.; Beerbaum, A., Chevron; Geddes, D., PREP Consulting Inc.

In today’s over-constrained work environment, planning model accuracy does not get the attention it deserves. In this article, we discuss order-of-magnitude LP (planning linear program) errors, what effect they have on margins and how to improve your LPs. Oil refiners and petrochemical plant operators plan and optimize their operations using LPs. Typical uses for planning LPs include crude oil/feedstock selection, production planning and monthly shutdown planning. Despite the fact that LPs have been in use for more than 40 years, and that major improvements have been made in their numerical techniques,1 it is difficult to keep them running accurately—mainly because of the complexi

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