The Capability Maturity Model (CMM) developed by the Software Engineering Institute specifies 5 levels of maturity for software development organizations. Level 1 is the initial level where processes are chaotic and success relies on individual efforts. Level 2 is repeatable, with basic project management processes. Level 3 is defined, where standardized processes are documented and integrated. Level 4 is managed, with quantitative goals and measurement of process performance. Level 5 is optimizing, with a focus on continuous process improvement through both incremental and innovative changes.