ADVISORY/Micromuse to Host Series of Service & Business Assurance Seminars in Latin America; Netcool Solutions Featured at Seminars in Bogota, Mexico City, Sao Paulo & Santiago

ADVISORY/Micromuse to Host Series of Service & Business Assurance Seminars in Latin America; Netcool Solutions Featured at Seminars in Bogota, Mexico City, Sao Paulo & Santiago

Business Editors & High-Tech Writers

ADVISORY…for Wednesday (May 22) – Thursday (May 30)

SAN FRANCISCO–(BUSINESS WIRE)–May 9, 2002

Micromuse Inc. (Nasdaq: MUSE), the leading provider of service and business assurance software, will host a series of informational seminars in four cities throughout Latin America to discuss how service providers and enterprises can maintain the uptime of their business infrastructure and IT based services using best-of-breed solutions.

Micromuse partners AFA Tecnologia, AMR Telecomunicaciones, Icaro, Medidata, and Selesta Mexico will co-sponsor the series, which runs May 22nd -30th 2002.

Attendees will learn first-hand how Micromuse’s Netcool(R) solutions provide end-to-end IT management. Specific attention will be given to solutions for effectively managing service performance and availability, security environments and total cost of ownership. Netcool customers and partners will also present:

Dates and venues for the seminar series are:

May 22nd – Casa Dann Carlton, Bogota, Colombia.

May 24th – Presidente Inter-Continental, Mexico City, Mexico.

May 28th – Hotel Inter-Continental, Sao Paulo, Brazil.

May 30th – Hotel Inter-Continental, Santiago, Chile.

For additional conference, press and registration information, please visit the Micromuse Web site at http://www.micromuse.com/events/seminars/la_sem2002/

About the Netcool Suite

Micromuse’s Netcool(R) software suite provides businesses with the assurance that their networks, services and applications are working. By allowing our customers to see what’s happening throughout the infrastructure in realtime, Netcool applications enable them to respond to problems before they cause network-based business services to go down.

Netcool suite applications install out-of-the-box, deploy rapidly and scale as networks grow. Micromuse’s flagship, Netcool/OMNIbus(TM) application, includes a library of off-the-shelf software modules that allow our customers to collect and consolidate fault information from more than 300 popular environments spanning voice and IP, cable/broadband, switches and routers, and enterprise management systems.

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of service and business assurance software. Micromuse’s recent list of awards include the Crossroads A-List Award for Best IP Network Diagnosis Product for the Netcool(R)/Visionary(TM) application. In addition, Micromuse was recently recognized in the Forbes 500, Bloomberg’s Tech 100, the Barron’s 500, the Business Week Info Tech 100, Deloitte & Touche’s Technology Fast 500, the San Francisco Chronicle 500 and Network World’s NW200. Micromuse customers include AT&T, BT, Cable & Wireless, Charles Schwab, Deutsche Telekom, Digex, EarthLink, GE Appliances, ITC DeltaCom, J.P. Morgan Chase, One 2 One and Verizon. Headquarters are located at 139 Townsend Street, San Francisco, CA 94107; (415) 538-9090. 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.

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