Maturity models in Business Intelligence (BI) put forth a baseline for measuring the value of initiatives in this area, helping organizations to understand where they are and what improvements are needed. In this context, the main problem for organizations that are aware of their current level of BI maturity and want to implement improvements is to know how to make them. Currently, there are no studies guiding organizations to make BI maturity improvements. This paper presents a framework called GMM-BI to measure, analyze, plan, and implement BI maturity improvements in an organization for a given key process area (KPA). In general, the framework is instanced in KPA knowledge for which three procedures are defi ned so that organizations can perform the activities defi ned for a given KPA. In addition, the proposed guide considers a methodological path to implement improvements in the current maturity state of the KPA involved. This methodological path describes the different phases, activities, and tasks to be performed by an organization to implement these improvements. The result of applying this methodological guide is a qualitative description of the current BI maturity level of the organization and a quantitative characterization of the maturity improvement of the processes making up the KPA involved. In addition, this methodological guide is applied in three case studies.