China's PCCW Limited Installs Netcool Solutions as Added Service Assurance for Customers.

Business Editors/High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--April 28, 2003

Netcool(R) Suite Strengthens Telecom Systems and Service Performance

for PCCW Customers Across Hong Kong 

Micromuse Inc. (Nasdaq:MUSE), the leading provider of service and business assurance software announced that PCCW (www.pccw.com) has deployed the Netcool solution.

By enabling the proactive consolidation and correlation of performance data, the Netcool solution helps manage the quality and availability of telecom and IT services. PCCW Limited is Hong Kong's leading fixed-line telecommunications network operator and Internet service provider.

"We are very happy with the ease of implementation and flexibility that the Netcool suite provides," said Mr. C. W. Ming, Network Management System Development Manager at PCCW. "Netcool has already given PCCW a competitive advantage through its ability to increase user productivity and responsiveness and is providing a considerable costs savings by helping to centralize PCCW's service management infrastructure, which is important to our growing business."

The Netcool solution provides a solid management foundation with which organizations are able to easily monitor disparate systems and services. The ability to consolidate and view IT data from across the service infrastructure helps increase operational efficiencies by improving administrative workflow throughout the organization. PCCW selected Micromuse's Netcool solutions for the ability to easily integrate with existing management systems, quick implementation and competitive pricing model.

"Despite the recent economic climate, the telecommunications market is still very active and willing to invest in core technologies that provide the service quality and availability that customers expect," said David Zhang, Micromuse, Vice President of Greater China. "Netcool solutions provide the flexibility and scalability required to continually enhance service management, which is significant to helping PCCW manage future growth."

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of service and business assurance software solutions. The Netcool(R) software suite provides organizations with the assurance that their IT systems are supporting and driving profits 24 hours a day. Unlike traditional infrastructure management systems, Netcool solutions provide realtime end-to-end visibility and accurate troubleshooting from a business perspective. Such business intelligence allows organizations to respond to problems quickly, streamline workflow processes and improve business uptime. Micromuse customers include AT&T, BT, Cable & Wireless, Charles Schwab, Deutsche Telekom, Digex, EarthLink, GE Appliances, ITC^DeltaCom, J.P. Morgan Chase, T-Mobile and Verizon. Headquarters are located at 139 Townsend Street, San Francisco, Calif. 94107; [phone]. The Web site is at www.micromuse.com.

Micromuse and Netcool are registered trademarks of Micromuse Ltd. All other trademarks and registered trademarks in this document are the properties of their respective owners. Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Any forward-looking statements contained herein are based on current expectations, but are subject to a number of risks and uncertainties.

The factors that could cause actual future results to differ materially from the forward-looking statements include the following: fluctuations in customer demand, the Company's ability to manage its growth (including the ability to hire sufficient sales and technical personnel), the risks associated with the expansion of the Company's distribution channels, the risk of new product introductions and customer acceptance of new products; the rapid technological change which characterizes the Company's markets, the risks associated with competition, the risks associated with international sales as the Company expands its markets, and the ability of the Company to compete successfully in the future, as well as other risks identified in the Company's Securities and Exchange Commission Filings, including but not limited to those appearing under the caption "Risk Factors" in the Company's most recent Quarterly Reports on Form 10-Q and on Form 10-K on file with the Securities and Exchange Commission and available on the Company's Web site.