Lyondell Signs Agreement for PlantTriage Software


Hartland, Wis., Jan. 15, 2007 - ExperTune Inc. announced that Lyondell Chemical Company has executed an agreement to license PlantTriage® Performance Supervision Software at up to 25 of its manufacturing facilities worldwide.

Under the agreement, Lyondell will use the PlantTriage Performance Supervision Software to monitor and analyze real-time data from their plant control systems. This data will be used in identifying and prioritizing specific plant improvements, including identifying instrument and valve failures and maintaining control of tuning issues.

PlantTriage Software combines real-time data with decades of engineering expertise. The software delivers savings by improving control, eliminating bottlenecks and pinpointing faulty equipment.

"Lyondell places a strong emphasis on continuous improvement. A key aspect is the
reduction of unnecessary operator work load, so the operator can focus on optimization
of production and quality. An important step in this direction is improvement of our base control performance. Based on my experience with ExperTune and PlantTriage
Software over the years, we know we can achieve significant improvements and expect
to leverage this experience at all our sites," says Lothar Lang, consulting engineer,
Lyondell.

Industries using PlantTriage Software include oil and gas producers; metal and mining
companies; chemical, pulp and paper manufacturers; and utility companies.

"Installing PlantTriage Software at multiple sites allows our clients to greatly leverage their internal expertise in process and controls. In effect, they are boosting the results of their engineering staff, without adding staffing," says Kevin Gibbs, CEO, ExperTune.

For more details on PlantTriage Software, contact ExperTune at +1 262 369-7711.

About PlantTriage
PlantTriage is a performance supervision system, designed to improve the performance
of equipment, operations, and controls. PlantTriage Software extracts data from
existing control systems, using industry-standard OPC communications. Based on
ExperTune's award-winning control loop optimization tools, PlantTriage Software then
makes prioritized recommendations for performance improvements. With integrated
control loop optimization tools, PlantTriage Software is the only complete performance
supervision system. For more information about PlantTriage Software, visit
www.planttriage.com.

About ExperTune
For 20 years, ExperTune has created award-winning optimization software that runs in
thousands of plants worldwide. PlantTriage Performance Supervision Software
oversees the optimization of an entire plant. PlantTriage Software optimizes the entire
process, including equipment, operations, and controls. ExperTune's full suite of
optimization tools is designed to increase the efficiency of processes. The company's
analysis tools include interaction analysis, modeling, linearization, valve wear analysis, pH linearization, time series analysis, MPC performance improvement, 6-sigma,
frequency analysis, and process modeling.

About Lyondell Chemical Company
Lyondell Chemical Company, headquartered in Houston, Texas, is North America's
third-largest independent, publicly traded chemical company. Lyondell is a major global
manufacturer of basic chemicals and derivatives including ethylene, propylene, titanium
dioxide, styrene, polyethylene, propylene oxide and acetyls. It also is a refiner of heavy, high-sulfur crude oil and a significant producer of gasoline-blending components. Lyondell is a global company operating on five continents and employs approximately 11,000 people worldwide.

From: ExperTune Inc., USA

Lake Country Research Center
1020 James Drive Suite A
Hartland, WI 53029
Ph: 262-369-7711
Fax: 262-369-7722
www.expertune.com

Media contact:
George Buckbee,
Tel: +1 262 369-7711
george.buckbee@expertune.com

or

Eric Stebel,
Lyondell Chemical Company,
Tel: +1 713 309-3987
eric.stebel@lyondell.com

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