Software Engineering Institure (SEI), Capability Maturity Model (CMM), Capabality Maturity Model Integration (CMMI), International Organization for Standardization (ISO) are all tools to help measure, track, improve, and advance the software engineering processes.The SEI program of work is conducted in three principle areas: management practices, engineering practices, and acquisition practices. Within these broad areas of work, the SEI defines specific initiatives aimed at solving problems that impede the ability of organizations to acquire, build, and evolve software-intensive systems predictably, on time, within expected cost, with expected functionality, and without vulnerabilities. CMMI is a process improvement approach that provides organizations with the essential elements of effective processes. CMMI best practices are published in documents called models, which each address a different area of interest. There are now two areas of interest covered by CMMI models: Development and Acquisition.