This slide presentation outlines how an advanced geographic information system (GIS)/computerized maintenance management system (CMMS) integration provides a utility with an effective mobile customer response management tool. The presentation outlines key capabilities of both the GIS and CMMS systems involved in the project, and addresses how to integrate the two systems to get the most out of them. Three approaches of integration are presented and include: Develop Custom Applications; Develop CMMS Functionality in GIS ("GIS-centric CMMS"); Embed GIS Functionality in CMMS (Extend CMMS with GIS); and, Spatial extensions. A case study is outlined of the integration approach used by the Honolulu Board of Water Supply (HBWS), and the presentation outlines in detail how the integration of GIS/CMMS provides the complete solution, and the challenges and enhancements that mark the project's future opportunities at HBWS. Includes figures.