• • • • • • • • The Capability Maturity Model (CMM) is a methodology used to develop and refine an organization's software development process. The model describes a five-level evolutionary path of increasingly organized and systematically more mature processes.

Capability Maturity Model Integration (CMMI) is a process improvement approach, aimed on the organizational improvement. Agile is a iterative software development methodology, focused on the.

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CMM was developed and is promoted by the, a research and development center sponsored by the U.S. Department of Defense (DoD). SEI was founded in 1984 to address software engineering issues and, in a broad sense, to advance software engineering methodologies. More specifically, SEI was established to optimize the process of developing, acquiring, and maintaining heavily software-reliant systems for the DoD. Because the processes involved are equally applicable to the software industry as a whole, SEI advocates industry-wide adoption of the CMM. The CMM is similar to ISO 9001, one of the series of standards specified by the International Organization for Standardization ().

The ISO 9000 standards specify an effective quality system for manufacturing and service industries; ISO 9001 deals specifically with and maintenance. The main difference between the two systems lies in their respective purposes: ISO 9001 specifies a minimal acceptable quality level for software processes, while the CMM establishes a framework for continuous process improvement and is more explicit than the ISO standard in defining the means to be employed to that end. CMM's Five Maturity Levels of Software Processes • At the initial level, processes are disorganized, even chaotic. Success is likely to depend on individual efforts, and is not considered to be repeatable, because processes would not be sufficiently defined and documented to allow them to be replicated.

• At the repeatable level, basic project management techniques are established, and successes could be repeated, because the requisite processes would have been made established, defined, and documented. • At the defined level, an organization has developed its own standard software process through greater attention to documentation, standardization, and integration. • At the managed level, an organization monitors and controls its own processes through data collection and analysis.

• At the optimizing level, processes are constantly being improved through monitoring feedback from current processes and introducing innovative processes to better serve the organization's particular needs.

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I have never used Scrum, Agile, nor CMMI before, and the detailed description I read at is assuming a lot of knowledge. (It makes no sense to someone who doesn't already know what they are talking about.) The best way for me to really learn Scrim or Agile or CMMI is by using them. But where to start? The above link does not help me there. As a solo developer who is just looking for source control, should I start off with Scrum, Agile, or CMMI? To take the opinion-basedness out of this question, I will make my official question: What is the difference between Scrum, Agile, and CMMI in Layman's terms? (But really, I just am trying to figure out where to start!).

(Just FYI - I am cofounder of a company () that builds and sells enterprise software to a variety of technology organizations, so I have some background on these topics:-) ) Agile and Scrum are related, in that they are software development methods. Agile is an umbrella term for specific methods such as Scrum, Extreme Programming (XP) and others. CMMI, on the other hand, is a quality management framework useful for large organizations that need to measure themselves in terms of their overall capability and maturity to demonstrate repeatable quality of software work they do. Organizations can use a mix of software development methods - Agile methods (such as Scrum/ Kanban/ XP/ BDD/ TDD/ etc), 'traditional' methods (Waterfall, Iterative) or a mix (Hybrid Agile), depending on their business needs. They can still use CMMI as an overall governance framework to measure and develop their software capabilities. Definitely, as a solo developer, you don't need to worry about CMMI!