STATS Implements Adexa for Improved Asset Utilization and Customer Service.

Business Editors/High-Tech Writers

LOS ANGELES--(BUSINESS WIRE)--May 12, 2003

Visibility into Capacity Constraints and Impact of Planning Changes

Increases Satisfaction Among Global Semiconductor Manufacturers

Adexa, Inc., a leading provider of integrated supply chain and business management solutions, today announced the expansion of its successful implementation at ST Assembly Test Services Ltd. ("STATS" -- NNM: STTS and SGX: ST Assembly), a leading independent semiconductor test and advanced packaging service provider. The Factory Planning & Scheduling component of Adexa's eGPS solution-set, will further optimize STATS' manufacturing asset utilization and increase customer satisfaction levels.

Adexa's Factory Planning & Scheduling solution is linked to MySTATS -- an external, self-service portal which links up with customer networks to provide them online access to real time and reliable WIP (work-in-progress) reports as well as other relevant data from STATS operations. In particular, the shop floor sequencing component enhances STATS e-TAS(TM) system, an integrated "e-manufacturing" system that links STATS' entire shop floor operations to its business applications. With e-TAS(TM), STATS users are able to retrieve real time information and reports from the manufacturing shop floor. MySTATS and e-TAS(TM) are two key components of STATS IT architecture for supply chain management.

STATS is committed to delivering rapid, flexible and cost-effective services to its global semiconductor customers. In July 2001, the company chose Adexa to improve its responsiveness to orders, increase manufacturing throughput and capacity utilization, and provide the flexibility to accommodate planning changes. Further, STATS is using Adexa to optimize work in progress (WIP) inventory and minimize material inventory and associated holding costs. With Adexa, STATS is able to maintain a constant state of readiness to meet fluctuating business demands.

"Adexa has given us real-time visibility into material and capacity constraints, as well as the ability to anticipate and prevent future constraints," said Ng Tiong Gee, STATS Chief Information Officer. "This enables us to commit accurate dates to customers in half the time, and to proactively deal with bottlenecks before they impact asset utilization and customer service. Further, the Adexa solution-set has synchronized external systems and applications that are critical to planning, which automates previously manual processes. The aggregate business value of Adexa's system has helped us drive time and cost out of our operations, which is a competitive advantage for us."

"Real-time visibility into constraints, work in progress and the impact of planning changes is critical for companies that are committed to increasing customer satisfaction levels," said Dan Stoks, Adexa's Chief Operating Officer. "Another benefit of this improved flexibility and performance today, is freeing up assets for developing and delivering the technologies and services that will be in demand tomorrow. That too is a priority for STATS, and an area where Adexa is contributing to its long-term business development."

About STATS

ST Assembly Test Services Ltd. ("STATS" -- NNM: STTS and SGX: ST Assembly) is a leading semiconductor test and assembly service provider to fabless companies, integrated device manufacturers and wafer foundries. With its principal operations in Singapore and global operations in the United States, United Kingdom, Japan and Taiwan, STATS offers full back-end turnkey solutions to customers worldwide. STATS' expertise is in testing mixed-signal semiconductors, which are extensively used in fast growing communications applications such as data networking, broadband and mobile communications. STATS also offers advanced assembly services and has developed a wide array of traditional and advanced leadframe and laminate based products, including various ball grid array packages to serve some of the world's technological leaders. STATS was listed on the Nasdaq National Market and The Singapore Exchange in January 2000 and is in the Morgan Stanley Capital International (MSCI) Index and the Straits Times Industrial Index. Further information is available at www.stts.com

About Adexa

Founded in 1994, Adexa delivers solutions that synchronize corporate planning with operations planning and execution, to ensure assets are utilized to achieve strategic objectives. Adexa helps companies reduce the cost of goods sold, shorten lead-times for orders, and reduce inventory costs through improved supply chain collaboration and management.

Adexa's global customer base includes AMD, Firmenich, General Motors, Mannington Mills, Maytag, Philips, Pulse, Samsung, Siemens, TSMC, and Unilever. For more information, visit www.adexa.com.

Certain of the statements in this press release including statements regarding industry growth are forward-looking statements that involve a number of risks and uncertainties that could cause actual results to differ materially. Factors that could cause actual results to differ include general business and economic conditions and the state of the semiconductor industry; demand for end-use applications products such as communications equipment and personal computers; reliance on a small group of principal customers; decisions by customers to discontinue outsourcing of test and assembly services; changes in customer order patterns; rescheduling or canceling of customer orders; changes in product mix; capacity utilization; level of competition; pricing pressures including declines in average selling prices; continued success in technological innovations; delays in acquiring or installing new equipment; shortages in supply of key components; availability of financing; exchange rate fluctuations; litigation and other risks described from time to time in the Company's SEC filings, including its annual report on Form 20-F dated 31 March 2003. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.