Ivar Jacobson: System

Ivar Jacobson is Swedish computer scientist. Explore interesting quotes on system.
Ivar Jacobson: 12   quotes 0   likes

“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.”

Ivar Jacobson

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

Understanding , Support , Decision , Past

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

Ivar Jacobson

Source: 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.”

Ivar Jacobson

Source: 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.

Behavior

“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.”

Ivar Jacobson

Source: 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.

Life , Behavior , Nature , Change