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Advanced Process Control for the Refining and Petrochemical Industry
  News Release: Finding the Most Important Plant Upsets
Release date: Immediate (November 2005)
From: ExperTune Inc., USA
Media contact: George Buckbee, Tel: +1 262 369-7711

Finding the Most Important Plant Upsets

ALTERNATE TITLE: Find the Most Important Process Upsets with Oscillation Significance

PlantTriage now shows the impact that cyclic upsets have on your plant’s performance.
PlantTriage’s new “Oscillation Significance” identifies cycling problems in a plant, and ranks them
according to importance.

Oscillatory upsets are always a problem. They cause energy losses, lower product quality, and
reduced equipment life. Oscillation Significance uses a combination of statistical and frequencydomain
information to calculate a single, meaningful measure of significance for each process
parameter. Drill-down reporting ranks every process parameter in the plant by Oscillation

John Gerry, President of ExperTune, says “Our customers have asked for more tools to make
use of the enormous warehouse of information within PlantTriage. With Oscillation Significance,
you can look at a single number and evaluate a very complex cycling problem.”
John Gerry continued “Using traditional approaches, solving oscillation problems may take days
or weeks. Now, in minutes, you can have a prioritized assessment of the cycling for every part of
the process.”

PlantTriage Oscillation Detection analyzes every process variable in a system, looking for
patterns of cyclical behavior. It then identifies the source of oscillation to be valve problems,
tuning, or load disturbances. Oscillation Significance further refines these assessments by using
a combination of loop variability, oscillation detection, and percent of power by frequency. The
resulting measure of oscillation detection can be ranked directly, or in combination with economic
criteria. A list of process parameters ranked by oscillation significance is then displayed in a drilldown

About ExperTune:
For 19 years, ExperTune has created award-winning optimization software that runs in thousands
of plants world-wide. PlantTriage Performance Supervision Software oversees the optimization
of an entire plant. PlantTriage optimizes the entire process, including instrumentation, controllers,
and valves. ExperTune's full suite of optimization tools is designed to increase the efficiency of
processes. The company's analysis tools include simulation, modeling, robustness, linearization,
valve wear analysis, pH linearizer, time series analysis, multivariable, statistical, frequency
response, and PID tuning tools. ExperTune is a member of the OPC Foundation. For more
information, set your browser to www.expertune.com.