MUSE Micromuse (MM)

Micromuse Inc. (Nasdaq: MUSE), the leading provider of ultra-scalable, realtime business and service assurance software, today announced that China Communications World magazine has ranked Micromuse's Netcool(R) solutions among the top 100 solutions for China's telecom industry in 2005. Overall, the list names Micromuse three separate times for its Netcool solutions for IP Management, Integrated Alarm Management, and Mobile Data Network Management. Communications World is affiliated with the Chinese Ministry of Information Industry (MII) and is regarded as one of the most influential telecom industry publications in China. The objective of its 'Top 100 Solutions' awards is to recommend the best solutions to the China telecom industry, helping carriers streamline purchasing decisions and enabling the industry to raise overall performance and service levels. More than 300 candidate solutions, submitted by global telecom carriers, vendors and mobile service providers including Ericsson, Nokia, ZET and Huawei, were evaluated by Communications World. This evaluation program was supported by the Chinese Ministry of Information Industry and major Chinese carriers including China Telecom, China Mobile, and China Unicom. "We're very pleased to see that the quality and functionality of Micromuse's Netcool solutions has been recognized by Communications World. It is a strong endorsement of our efforts to deliver solutions that add real business value to China's telecommunications industry," said David Zhang, Vice President of Micromuse Greater China. "We have been working in China since 2000 and the Netcool suite of products has been implemented by major carriers including China Telecom, China Mobile, China Unicom, and China Netcom. We are committed to working to meet the needs of our customers for top-quality products and services in China." About Communications World magazine Communications World is affiliated with the Ministry of Information Industry, carrying news of government policies and developments within the telecommunications industry. Coverage includes news, special reports, economy and management, products and technology. It is a weekly publication with a circulation of 100,000. For more information about Communications World, visit its Web site at http://www.cww.net.cn. About Micromuse Micromuse Inc. (Nasdaq: MUSE) is the leading provider of ultra-scalable, realtime business and service 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 BT, Cable & Wireless, Deutsche Telekom, EarthLink, ITC DeltaCom, JPMorgan Chase, MCI, T-Mobile, and Verizon. Headquarters are located at 650 Townsend Street, San Francisco, Calif. 94103; (415) 568-9800. 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.