To help explain the specific properties of a web-style system, the authors use a model of restful maturity that was developed by Leonard Richardson and explained at a QCon talk. The model is nice way to think about using these techniques, so I thought I'd take a stab of my own explanation of it. (The protocol examples here are only illustrative, I didn't feel it was worthwhile to code and test them up, so there may be problems in the detail.)
The starting point for the model is using HTTP as a transport system for remote interactions, but without using any of the mechanisms of the web. Essentially what you are doing here is using HTTP as a tunneling mechanism for your own remote interaction mechanism, usually based on Remote Procedure Invocation.
The Capability Maturity Model (CMM) is a development model created in 1986 after a study of data collected from organizations that contracted with the U.S. Department of Defense, who funded the research. The term "maturity" relates to the degree of formality and optimization of processes, from ad hoc practices, to formally defined steps, to managed result metrics, to active optimization of the processes.
The Capability Maturity Model was originally developed as a tool for objectively assessing the ability of government contractors' processes to implement a contracted software project. The model is based on the process maturity framework first described in IEEE Software and, later, in the 1989 book Managing the Software Process by Watts Humphrey. It was later published in a report in 1993 and as a book by the same authors in 1995.
Though the model comes from the field of software development, it is also used as a model to aid in business processes generally, and has also been used extensively worldwide in government offices, commerce, and industry.
Active development of the model by the US Department of Defense Software Engineering Institute (SEI) began in 1986 when Humphrey joined the Software Engineering Institute located at Carnegie Mellon University in Pittsburgh, Pennsylvania after retiring from IBM. At the request of the U.S. Air Force he began formalizing his Process Maturity Framework to aid the U.S. Department of Defense in evaluating the capability of software contractors as part of awarding contracts.
The result of the Air Force study was a model for the military to use as an objective evaluation of software subcontractors' process capability maturity. Humphrey based this framework on the earlier Quality Management Maturity Grid developed by Philip B. Crosby in his book "Quality is Free". Humphrey's approach differed because of his unique insight that organizations mature their processes in stages based on solving process problems in a specific order. Humphrey based his approach on the staged evolution of a system of software development practices within an organization, rather than measuring the maturity of each separate development process independently. The CMM has thus been used by different organizations as a general and powerful tool for understanding and then improving general business process performance.
The CMM model's application in software development has sometimes been problematic. Applying multiple models that are not integrated within and across an organization could be costly in training, appraisals, and improvement activities. The Capability Maturity Model Integration (CMMI) project was formed to sort out the problem of using multiple models for software development processes, thus the CMMI model has superseded the CMM model, though the CMM model continues to be a general theoretical process capability model used in the public domain.
The CMM was originally intended as a tool to evaluate the ability of government contractors to perform a contracted software project. Though it comes from the area of software development, it can be, has been, and continues to be widely applied as a general model of the maturity of process (e.g., IT service management processes) in IS/IT (and other) organizations.
A maturity model can be used as a benchmark for comparison and as an aid to understanding - for example, for comparative assessment of different organizations where there is something in common that can be used as a basis for comparison. In the case of the CMM, for example, the basis for comparison would be the organizations' software development processes.
There are five levels defined along the continuum of the model and, according to the SEI: "Predictability, effectiveness, and control of an organization's software processes are believed to improve as the organization moves up these five levels. While not rigorous, the empirical evidence to date supports this belief".
The model was originally intended to evaluate the ability of government contractors to perform a software project. It has been used for and may be suited to that purpose, but critics[who?] pointed out that process maturity according to the CMM was not necessarily mandatory for successful software development.
This article details the NN/g UX-maturity model. As we continue to work with organizations to assess UX maturity and gather additional data about the evolution and outcomes of UX maturity, we plan to continue refining this model.
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Adopt the design system incrementally through the levels of the USWDS maturity model. Your project can progress both through higher levels of maturity and with more comprehensive maturity at each level. Most importantly, using the design system is about integrating the USWDS Design Principles, common goals that align teams across government and serve as an evaluative lens for design and implementation decisions.
Established in 2011 through a coordinated effort by over 200 security awareness officers, the SANS Security Awareness Maturity Model has become the industry standard which organizations use to not only benchmark the maturity of their program, but leverage as a strategic roadmap to both plan and communicate the impact of their program. What makes this model so powerful is that organizations can quickly determine why their program may not be having the impact they want, proven steps they can take to mature their program, and how to communicate the value of the program to their leadership.
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.
CMM was developed and is promoted by the Software Engineering Institute (SEI), a research and development center sponsored by the U.S. Department of Defense (DOD) and now part of Carnegie Mellon University. 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. SEI advocates industry-wide adoption of the CMM Integration (CMMI), which is an evolution of CMM. The CMM model is still widely used as well.
CMMI is a newer, updated model of CMM. SEI developed CMMI to integrate and standardize CMM, which has different models for each function it covers. These models were not always in sync; integrating them made the process more efficient and flexible.
SEI released the first version of CMMI in 2002. In 2013, Carnegie Mellon formed the CMMI Institute to oversee CMMI services and future model development. ISACA, a professional organization for IT governance, assurance and cybersecurity professionals, acquired CMMI Institute in 2016. The most recent version -- CMMI V2.0 -- came out in 2018. It focuses on establishing business objectives and tracking those objectives at every level of business maturity.
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