“Executable UML is designed to produce a comprehensive and comprehensible model of a solution without making decisions about the organization of the software implementation. It is a highly abstract thinking tool to aid in the formalization of knowledge, a way of thinking about and describing the concepts that make up an abstract solution to a client problem.”

Source: Executable Uml: A Foundation for Model-Driven Architecture, 2002, p. 10.

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Stephen J. Mellor13

British computer scientist 1952

Stephen J. Mellor (1952) British computer scientist

Source: Executable Uml: A Foundation for Model-Driven Architecture, 2002, p. 5.

“Ever wish you could draw a few diagrams, press a button, and have a working software system that meets your needs? Sound like magic? Perhaps, but that’s a major part of the Executable UML vision. The basic idea is that you will use a CASE tool to develop detailed UML diagrams and then supplement them by specifications written in a formal language, presumably the OMG’s Object Constraint Language (OCL). The basic idea behind Executable UML is that systems can be modeled at a higher level of abstraction than source code, simulated to support validation of your efforts, and then translated into efficient code. This higher-level of abstraction should help to avoid premature design, enable you to change your system as your requirements evolve, and to delay implementation decisions until the last minute.”

Scott W. Ambler (1966) Canadian software engineer/consultant/author

Source: Agile Modeling: Effective Practices for eXtreme Programming and the Unified Process (2002), p. 172

“The growing complexity of software is the motivation behind work on industrializing software development. In particular, current research in the area of model driven engineering (MDE) is primarily concerned with reducing the gap between problem and software implementation domains through the use of technologies that support systematic transformation of problem-level abstractions to software implementations. The complexity of bridging the gap is tackled through the use of models that describe complex systems at multiple levels of abstraction and from a variety of perspectives, and through automated support for transforming and analyzing models. In the MDE vision of software development, models are the primary artifacts of development and developers rely on computer-based technologies to transform models to running systems.”

Bernhard Rumpe (1967) German computer scientist

Source: Model-driven development of complex software: A research roadmap (2007), p. 37

“The Unified Modeling Language (UML) is a general-purpose visual modeling language that is used to specify, visualize, construct, and document the artifacts of a software system. It captures decisions and understanding about systems that must be constructed. It is used to understand, design, browse, conﬁgure, maintain, and control information about such systems. It is intended for use with all development methods, lifecycle stages, application domains, and media. The modeling language is intended to unify past experience about modeling techniques and to incorporate current software best practices into a standard approach. UML includes semantic concepts, notation, and guidelines. It has static, dynamic, environmental, and organizational parts. It is intended to be supported by interactive visual modeling tools that have code generators and report writers. The UML speciﬁcation does not deﬁne a standard process but is intended to be useful with an iterative development process. It is intended to support most existing object-oriented development processes.”

James Rumbaugh (1947) Computer scientist, software engineer

James Rumbaugh, Ivar Jacobson & Grady Booch (1998) The Unified Modeling Language Reference Manual. p. 1

“The Uniﬁed Modeling Language (UML) is a general-purpose visual modeling language that is used to specify, visualize, construct, and document the artifacts of a software system. It captures decisions and understanding about systems that must be constructed. It is used to understand, design, browse, conﬁgure, maintain, and control information about such systems. It is intended for use with all development methods, lifecycle stages, application domains, and media. The modeling language is intended to unify past experience about modeling techniques and to incorporate current software best practices into a standard approach. UML includes semantic concepts, notation, and guidelines. It has static, dynamic, environmental, and organizational parts. It is intended to be supported by interactive visual modeling tools that have code generators and report writers. The UML speciﬁcation does not deﬁne a standard process but is intended to be useful with an iterative development process. It is intended to support most existing object-oriented development processes.”

Grady Booch (1955) American software engineer

James Rumbaugh, Ivar Jacobson, & Booch (1999) The Unified Modeling Language Reference Manual. p. 1

Ivar Jacobson (1939) Swedish computer scientist

James Rumbaugh, Ivar Jacobson, & Grady Booch (1999) The Unified Modeling Language Reference Manual. p. 1.

“The formal administrative design can never adequately or fully reflect the concrete organization to which it refers, for the obvious reason that no abstract plan or pattern can—or may, if it is to be useful—exhaustively describe an empirical totality. At the same time, that which is not included in the abstract design (as reflected, for example, in a a staff and-line organization chart) is vitally relevant to the maintenance and development of the formal system itself.”

Philip Selznick (1919–2010) American sociologist

Source: "Foundations of the Theory of Organization," 1948, p. 25

“If I had an hour to solve a problem I'd spend 55 minutes thinking about the problem and 5 minutes thinking about solutions.”

Albert Einstein (1879–1955) German-born physicist and founder of the theory of relativity

“Today some evidence arises that UML will more and more be used not as a specification language but as a high level programming language. This has some advantages, as if the concepts of UML are executable, they can immediately be animated and tested, or the generated code even be used as implementation. Thus UML probably will have an implementation-oriented semantics describing this animation.”

Bernhard Rumpe (1967) German computer scientist

Bernhard Rumpe (1998) " A Note on Semantics (with an Emphasis on UML) http://sse-tubs.de/~rumpe/publications/papers/RUM98a/RUM98a.pdf." Proceedings of Second ECOOP Workshop on Precise Behavioral Semantics. 1998.

“Since you have already identified the problem, the solution is not far from you. Now it is about making the final decision to live a peaceful life full of blessings.”

Mwanandeke Kindembo (1996) Congolese author

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Stephen J. Mellor13

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