The prevailing view has been called " The Rational Model ", " Technical Problem Solving " and " The Reason-Centric Perspective ".

The Rational Model is based on a rationalist philosophy and underlies the Waterfall Model, Systems Development Life Cycle and much of the engineering design literature.

Typical stages consistent with The Rational Model include the following.

The Rational Model has been widely criticized on two primary grounds

The Action-Centric Perspective is a label given to a collection of interrelated concepts, which are antithetical to The Rational Model.

Like the Rational Model, the Action-Centric model sees design as informed by research and knowledge.

However, research and knowledge are brought into the design process through the judgment and common sense of designers – by designers " thinking on their feet " – more than through the predictable and controlled process stipulated by the Rational Model.

One possible criticism is that it is less intuitive than The Rational Model.

' A Behavioral Model of Rational Choice ', Quarterly Journal of Economics, vol.

* Mathematics: Approximation theory — Arakelov theory — Asymptotic theory — Bifurcation theory — Catastrophe theory — Category theory — Chaos theory — Choquet theory — Coding theory — Combinatorial game theory — Computability theory — Computational complexity theory — Deformation theory — Dimension theory — Ergodic theory — Field theory — Galois theory — Game theory — Graph theory — Group theory — Hodge theory — Homology theory — Homotopy theory — Ideal theory — Intersection theory — Invariant theory — Iwasawa theory — K-theory — KK-theory — Knot theory — L-theory — Lie theory — Littlewood – Paley theory — Matrix theory — Measure theory — Model theory — Morse theory — Nevanlinna theory — Number theory — Obstruction theory — Operator theory — PCF theory — Perturbation theory — Potential theory — Probability theory — Ramsey theory — Rational choice theory — Representation theory — Ring theory — Set theory — Shape theory — Small cancellation theory — Spectral theory — Stability theory — Stable theory — Sturm – Liouville theory — Twistor theory

" A Behavioral Model of Rational Choice ", in Models of Man, Social and Rational: Mathematical Essays on Rational Human Behavior in a Social Setting.

" Rational social management ", he said, " proceeds in a spiral of steps, each of which is composed of a circle of planning, action and fact-finding about the result of action ". Figure 1: Systems Model of Action-Research ProcessLewin's description of the process of change involves three steps: Unfreezing: Faced with a dilemma or disconfirmation, the individual or group becomes aware of a need to change.

* Rational Choice with Passion: Virtue in a Model of Rational Addiction-In this link the author uses Aristotelian virtue as a mediator between passion and reason in the construction of utility / consumption functions in an esoteric part of consumer behaviour theory related to decision making in addictive situations.

Philippe Kruchten ( born 1952 ) is a Canadian software engineer, and Professor of Software Engineering at University of British Columbia in Vancouver, Canada, known as Director of Process Development ( RUP ) at Rational Software, and developer of the 4 + 1 Architectural View Model.

* Rational Decision-Making Model

Or, to put it bluntly, this approach ( which Allison terms the " Rational Actor Model ") violates the law of falsifiability.

It was developed by Grady Booch, while at Rational Software ( now part of IBM ).

Rational development was considered the most important, as essential to philosophical self-awareness and as uniquely human.

After Rational Software Corporation hired James Rumbaugh from General Electric in 1994, the company became the source for the two most popular object-oriented modeling approaches of the day: Rumbaugh's Object-modeling technique ( OMT ), which was better for object-oriented analysis ( OOA ), and Grady Booch's Booch method, which was better for object-oriented design ( OOD ).

Jacobson joined Rational in 1995, after his company, Objectory AB, was acquired by Rational.

In 1996, Rational concluded that the abundance of modeling languages was slowing the adoption of object technology, so repositioning the work on a unified method, they tasked the Three Amigos with the development of a non-proprietary Unified Modeling Language.

Rational Recovery Systems, Inc. was founded in 1986 by Jack Trimpey, a California-licensed clinical social worker.

The results of the impact on this type of recovery are too few to make an educational assumption " This research was conducted before Rational Recovery disbanded their meetings in favor of self-recovery treatment.

Other attempts included moving the seat rearward and driving the wheel by levers or treadles, as in the Xtraordinary or Facile, or gears, by chain as in the Kangaroo or at the hub in the Crypto ; another option was to move the seat well back, as in the Rational.

The Rational Dress Society was founded in 1881 in London.

According to Lee Nackman, Chief Technology Officer of IBM's Rational division ( originating in 2003 ) at that time, the name " Eclipse " ( dating from at least 2001 ) was not a wordplay on Sun Microsystems, as the product's primary competition at the time of naming was Microsoft Visual Studio.

His work was included in numerous group exhibitions including Involving Technical Materials and Processes, organized by Experiments in Art and Technology, in collaboration with the Brooklyn Museum, Brookly, NY and The Museum of Modern Art, New York, NY ( 1968 ); New Learning Spaces & Places, Walker Art Center, Minneapolis, MN ( 1974 ); Whitney Biennial Exhibition, Whitney Museum of American Art, New York, NY ( 1975, 1977, 1981, 1983, 1985, 1987, 1989, 1991 ); Documenta 6, Kassel, Germany, ( 1977 ); Venice Biennale, US Pavilion, Venice, Italy, ( 1980 ); Sydney Biennale, Sydney, Australia, ( 1982 ); II Bienal de La Habana, Havana, Cuba, ( 1986 ); The Thinking Eye, International Center for Photography, New York, NY, ( 1987 ); Passages de l ’ image, Musée national d ' Art moderne-Centre Georges Pompidou, Paris, France, ( 1990 ); Video Art: The First 25 Years, The Museum of Modern Art, and The American Federation of Arts, New York, NY, ( 1995 ); Info Art ’ 95, Kwangu Biennial, Gwangju, Korea, ( 1995 ); Electronic Highways, The Museum of Modern Art, New York, NY, ( 1997 ); and Rational / Irrational, Haus der Kulturen der Welt, Berlin, Germany, ( 2008-2009 ).

The Rational Unified Process ( RUP ) is a software process product, originally developed by Rational Software, which was acquired by IBM in February 2003.

To make this knowledge more accessible, Philippe Kruchten, a Rational techrep, was tasked with the assembly of an explicit process framework for modern software engineering.

RUP was created in 1996 when Rational acquired the Objectory Process that had been written by Ivar Jacobson.

In January 2007, the new RUP certification examination for IBM Certified Solution Designer-Rational Unified Process 7. 0 was released which replaces the previous version of the course called IBM Rational Certified Specialist-Rational Unified Process.

Albert Ellis ( September 27, 1913 – July 24, 2007 ) was an American psychologist who in 1955 developed Rational Emotive Behavior Therapy ( REBT ).

The Institute for Rational Living was founded as a non-profit organization in 1959.

( It was originally known as Rational Therapy and then Rational-Emotive Therapy.

In early 2011 the book Rational Emotive Behavior Therapy by Dr Albert Ellis and his wife Dr Debbie Joffe Ellis was released by the American Psychological Association.

The first of his nine books, Zen: A Rational Critique ( 1961 ) was based on his doctoral dissertation.

( An advocate of Rational Expectations would say, rather, that the pronouncements of central banks are facts that must be incorporated into one's forecast because central banks can act independently ).

* Albert Ellis the psychologist who developed Rational Emotive Behavior Therapy

This tradition thereafter merged with earlier work of a few clinicians, labeled as Cognitive Therapy ( CT ), developed by Aaron Beck, and Rational Emotive Therapy ( RET ) developed by Albert Ellis.

Caplan ‘ s ideas are more fully developed in his book The Myth of the Rational Voter ( Princeton University Press 2007 ).

Albert Ellis ( 1913 – 2007 ), who developed Rational emotive behavior therapy, acknowledged influence from general semantics and delivered the Alfred Korzybski Memorial Lecture in 1991.

Rational expectations theories were developed in response to perceived flaws in theories based on adaptive expectations.

In 1990, Rational launched three parallel development efforts: re-implementation of the Rational Environment ( for Ada ) to run on Unix-based workstations from Sun and IBM, development of a comparable Rational Environment for C ++ to run on Unix-based workstations from Sun and IBM, and development of a workstation-hosted modeling tool called Rose that supported a graphical notation developed by Grady Booch.

The resulting entity was named " Rational Software ", and promptly integrated the Rational Ada and C ++ environments with the code generators and runtimes developed by Verdix.

It is developed by the Rational Software division of IBM.

Many games used DOS / 4GW, which was developed by Rational Systems as a subset of DOS / 4G and was distributed with the Watcom C compiler.

Birmingham had a vigorous and confident Nonconformist community by the 1680s, at a time when freedom of worship for Nonconformists nationally had yet to be granted ; and by the 1740s this had developed into an influential group of Rational Dissenters.

It was developed by Booch while at Rational Software.

ACT-R ( pronounced act-ARE: Adaptive Control of Thought — Rational ) is a cognitive architecture mainly developed by John Robert Anderson at Carnegie Mellon University.