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Frases de Ivar Jacobson

Ivar Hjalmar Jacobson , es un ingeniero sueco en Ciencias de la computación.

Inventó el diagrama de secuencia y desarrolló los diagramas de colaboración. También impuso el uso de diagramas de estado de transición para describir los flujos de mensajes entre los componentes. Fue uno de los desarrolladores originales del SDL , que se convirtió en estándar en 1967. Wikipedia  

✵ 2. septiembre 1939
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Ivar Jacobson: Frases en inglés

“The analysis model will not be a reflection of what the problem domain looks like… The reason is simply to get a more maintainable structure where changes will be local and thus manageable. We thus do not model reality as it is, as object orientation is often said to do, but we model the reality as we want to see it and to highlight what is important in our application.”

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Ivar Jacobson

Fuente: Object-Oriented Software Engineering: A Use Case Driven Approach (1992), p. 185: cited in: " Object Oriented Software Engineering: A Use Case Driven Approach Ivar Jacobson, et al. (1992) http://tedfelix.com/software/jacobson1992.html", Book review by Ted Felix on tedfelix.com, 2006.

“People regard their environment in terms of objects. Therefore it is simple to think in the same way when it comes to designing a model.”

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Ivar Jacobson

Fuente: Object-Oriented Software Engineering: A Use Case Driven Approach (1992), p. 42; cited in: Sten Carlsson and Benneth Christiansson. (1999) " The Concept of Object and its Relation to Human Thinking: Some Misunderstandings Concerning the Connection between Object-Orientation and Human Thinking http://www.vits.org/publikationer/dokument/289.pdf." Informatica, Lith. Acad. Sci. 10.2. p. 147-160.

“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.”

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Ivar Jacobson

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

“A use case is a complete course of events in the system, seen from a user’s perspective.”

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Ivar Jacobson

Fuente: Object-Oriented Software Engineering: A Use Case Driven Approach (1992), p. 157.

“When a user uses the system, she or he will perform a behaviorally related sequence of transactions in a dialogue with the system. We call such a special sequence a use case.”

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Ivar Jacobson

Fuente: Object-Oriented Software Engineering: A Use Case Driven Approach (1992), p. 127; as cited in: Journal of Object-oriented Programming Vol 10, Nr 2-9. p. 32.

“The control objects model functionality that is not naturally tied to any other object… We do not believe that the best (most stable) systems are built by only using objects that correspond to real-life entities, something that many other object-oriented analysis and design techniques claim… Behavior that we place in control objects will, in other methods, be distributed over several other objects, making it hard to change this behavior.”

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Ivar Jacobson

Fuente: Object-Oriented Software Engineering: A Use Case Driven Approach (1992), p. 133 as cited in: " Object Oriented Software Engineering: A Use Case Driven Approach Ivar Jacobson, et al. (1992) http://tedfelix.com/software/jacobson1992.html", Book review by Ted Felix on tedfelix.com, 2006.