“I was astonished to be invited to what became the meeting that originated the Agile Manifesto because my work had always been based around building models… The other signatories were kind enough, back in 2001, to write the manifesto using the word “software” (which can include executable models), not “code” (which is more specific.) As such I felt able, in good conscience, to become a signatory to the Manifesto while continuing to promote executable modeling. Ten years on we have a standard action language for agile modeling.”

—  Stephen J. Mellor

Mellor (2011) " A Personal Reflection on Agile Ten Years On http://www.infoq.com/articles/personal-reflection-agile-ten-years-mellor" in: InfoQ, Feb 11, 2011.

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Stephen J. Mellor13
British computer scientist 1952

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“Creating a modeling language that is also an executable language has long been a goal of the software community. Many years ago, in 1968 to be exact, while working with software components to successfully develop a telecommunications system, we created a modeling language that was the forerunner to UML. To model components we used sequence diagrams, collaboration diagrams, and state transition diagrams (a combination of state charts and activity diagrams). Our modeling language then seamlessly translated the component models into code. Each code component was in its turn compiled into an executable component that was deployed in our computer system. The computer system was a component management system—thus we had "components all the way down."”

Stephen J. Mellor (1952) British computer scientist

Source: Executable Uml: A Foundation for Model-Driven Architecture, 2002, p. xxiii: Foreword.

Richard Stallman photo

“GNU, which stands for Gnu's Not Unix, is the name for the complete Unix-compatible software system which I am writing so that I can give it away free to everyone who can use it.
[this document has a footnote mentioning that the word "free" was not used as carefully in this 1985 Manifesto as it should have been]”

Richard Stallman (1953) American software freedom activist, short story writer and computer programmer, founder of the GNU project

1980s, GNU Manifesto (1985)

“In its current form UML is designed to support a wide variety of different modelling techniques and formalisms. This is evident, for example, in the state machine formalism which allows both Moore and Mealy formalism with hierarchical states including concurrent sub-states and both synchronous and asynchronous calling semantics. The result of this is not only that almost any state modelling style can be supported but also that many combinations of elements have no defined execution semantics. It is now widely recognised within the UML community, however, that considerable benefit can be gained by forming subsets of the UML with well defined execution semantics. Such subsets can form an “executable UML” which would enable the simulation, execution, testing and ultimately translation of UML models into target code. As part of this movement, work is progressing under the auspices of the OMG towards the definition of “profiles” that define such subsets and towards the more detailed definition of the contents of “actions” including a more precise definition of the execution semantics of UML models.”

Stephen J. Mellor (1952) British computer scientist

Mellor and Ian Wilkie (1999). A mapping from Shlaer-Mellor to UML http://www.ooatool.com/docs/SMUML99.pdf. Technical report, Projtech Inc. and Kennedy Carter Limited, 1999.

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“#The availability of high-quality Model Compilers and Virtual Execution Environments (VEEs) that provide "out of the box" platforms upon which Executable UML models can execute. These VEEs, which exist today in a somewhat incipient stage, will someday soon reduce low-level system architectures to near-commodity status.”

Grady Booch (1955) American software engineer

Cited in: Gerry Boyd (2003) &quot; Executable UML: Diagrams for the Future http://www.devx.com/enterprise/Article/10717.&quot; published at devx.com, February 5, 2003. <br class="br">The Limits of Software

““Eugenics Manifesto” was the name given to an article supporting eugenics. The document, which appeared in Nature, September 16, 1939, was a joint statement issued by America’s and Britain’s most prominent biologists, and was widely referred to as the “Eugenics Manifesto.” The manifesto was a response to a request from Science Service, of Washington, D. C. for a reply to the question “How could the world’s population be improved most effectively genetically?” Two of the main signatories and authors were Hermann J. Muller and Julian Huxley. Julian Huxley, as this book documents, was the founding director of UNESCO from the famous Huxley family. Muller was an American geneticist, educator and Nobel laureate best known for his work on the physiological and genetic effects of radiation. Put into the context of the timeline, this document was published 15 years after “Mein Kampf” and a year after the highly publicized violence of Kristallnacht. In other words, there is no way either Muller or Huxley were unaware at the moment of publication of the historical implications of eugenic agendas.”

A.E. Samaan

Source: From a "Race of Masters" to a "Master Race": 1948 to 1848

Raheem Kassam photo

“UKIP’s manifesto was a rehash of its 2015 offering. Which was good, but there was barely anything for us to sink our teeth into. Burka ban? Great. I had it in my leadership manifesto last year. But let’s face it, the people keen on such a thing would have probably voted UKIP anyway. Where were the new, flatter tax plans? Where was the digital strategy? Where were the “wedge issue” moments that drew a distinction between the political establishment and the insurgent populist party? I didn’t see any.”

Raheem Kassam (1986) British journalist and politician

Dear UKIP Centrists, You Failed. Now Get Out of Nigel’s Way! http://www.breitbart.com/london/2017/06/09/kassam-dear-ukip-centrists-failed-now-get-nigels-way/ (June 9, 2017)

Barry Boehm photo

“The Code-and-Fix Model. The basic model used in the earliest days of software development contained two steps:
:1. Write some code.
:2. Fix the problems in the code.
Thus, the order of the steps was to do some coding first and to think about the requirements, design, test, and maintenance later. This model has three primary difficulties: (a) After a number of fixes, the code became so poorly structured that subsequent fixes were very expensive. This underscored the need for a design phase prior to coding. (b) Frequently, even well designed software was such a poor match to users' needs that it was either rejected outright or expensively redevelopment…”

Barry Boehm (1935) American software engineer

Source: A spiral model of software development and enhancement. (1988), p. 61-62

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“The word model is used as a noun, adjective, and verb, and in each instance it has a slightly different connotation. As a noun "model" is a representation in the sense in which an architect constructs a small-scale model of a building or a physicist a large-scale model of an atom. As an adjective "model" implies a degree or perfection or idealization, as in reference to a model home, a model student, or a model husband. As a verb "to model" means to demonstrate, to reveal, to show what a thing is like.”

Russell L. Ackoff (1919–2009) Scientist

Source: 1960s, Scientific method: optimizing applied research decisions, 1962, p. 108 as cited in: Charles West Churchman, Richard O. Mason (1976) World modeling: a dialogue. p. 23.

Barry Boehm photo

“The spiral model presented in this article is one candidate for improving the software process model situation. The major distinguishing feature of the spiral model is that it creates a risk-driven approach to the software process rather than a primarily document-driven or code-driven process. It incorporates many of the strengths of other models and resolves many of their difficulties.”

Barry Boehm (1935) American software engineer

Source: A spiral model of software development and enhancement. (1988), p. 61

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“…we are in a logic of simulation, which no longer has anything to do with a logic of facts and an order of reason. Simulation is characterized by a precession of the model, of all the models based on the merest fact - the models come first, their circulation, orbital like that of the bomb, constitutes the genuine magnetic field of the event. The facts no longer have a specific trajectory, they are born at the intersection of models, a single fact can be engendered by all the models at once.”

Jean Baudrillard (1929–2007) French sociologist and philosopher

"The Precession of Simulcra,MÖBIUS - SPIRALING NEGATIVETY
1980s, Simulacra and Simulation (1981)

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