Ivar Jacobson

Source: Wikipedia, the free encyclopedia.
Ivar Jacobson
Software Engineering
InstitutionsEricsson, Objective Systems, Rational Software, IBM, Ivar Jacobson International

Ivar Hjalmar Jacobson (born 1939) is a

aspect-oriented software development
and Essence.

Biography

Ivar Jacobson was born in

Royal Institute of Technology in Stockholm in 1985 on the thesis Language Constructs for Large Real Time Systems.[citation needed
]

After his master's degree, Jacobson joined Ericsson and worked in R&D on computerized switching systems AKE [1] and AXE including PLEX. After his PhD thesis in April 1987, he started Objective Systems with Ericsson as a major customer. A majority stake of the company was acquired by Ericsson in 1991, and the company was renamed Objectory AB. Jacobson developed the software method Object-Oriented Software Engineering (OOSE) published 1992, which was a simplified version of the commercial software process Objectory (short for Object Factory).

In October, 1995, Ericsson divested Objectory to Rational Software[2] and Jacobson started working with Grady Booch and James Rumbaugh, known collectively as the Three Amigos.

When IBM bought Rational in 2003, Jacobson decided to leave, after he stayed on until May 2004 as an executive technical consultant.

In mid-2003 Jacobson formed Ivar Jacobson International (IJI) [3] which operates across three continents with offices in the UK, the US, Sweden, Switzerland, China, and Singapore.

Work

Ericsson

In 1967 at Ericsson, Jacobson proposed the use of

telephone switches Ericsson was developing. In doing this he invented sequence diagrams, and developed collaboration diagrams. He also used state transition diagrams to describe the message flows between components.[citation needed
]

Jacobson saw a need for blueprints for software development. He was one of the original developers of the

Specification and Design Language (SDL).[4] In 1976, SDL became a standard in the telecoms industry.[5]

At Objectory he also invented use cases as a way to specify functional software requirements.[6][7]

Rational Software

At Rational, Jacobson and his friends,

Rational Unified Process under the leadership of Philippe Kruchten.[7]

Essential Unified Process

In November 2005, Jacobson announced the

Essential Unified Process or “EssUP” for short. EssUP was a new “Practice”-centric[clarification needed] software development process derived from established software development practices. It integrated practices sourced from three different process camps: the unified process camp, the agile software development
camp and the process improvement camp. Each one of them contributed different capabilities: structure, agility and process improvement.

Ivar has described EssUP as a "super light and agile" RUP.[

Visual Studio Team System and Eclipse.[citation needed
]

EssWork

Standing on the experience of EssUP Ivar and his team, in particular Ian Spence and Pan Wei Ng, developed EssWork starting in 2006. EssWork is a framework for working with methods. It is based on a kernel of universal elements always prevalent in software development endeavors. On top of the kernel some fifteen practices have been defined. A team can create their own method by composing practices.

SEMAT and Essence

In November 2009, Jacobson, Bertrand Meyer and Richard Soley ("the Troika") started an initiative called SEMAT (Software Engineering Method and Theory) to seek to develop a rigorous, theoretically basis for software engineering practice, and to promote its wide adoption by industry and academia. SEMAT has been inspired by the work at IJI, but with a fresh new start. Essence, an OMG standard since November 2014, is the end result.[8] Methods are seen by Essence as combining software engineering and development techniques. It seeks to make it possible to separate practices from methods, making it easier for them to be combined and reused to create methods that are best suited to the situation.[9]

Publications

Jacobson has published several books and articles,[10] a selection:

References

  1. ^ "The Ericsson story - Ericsson". 18 August 2016.
  2. ^ DBMS Interview - October 1996 Archived 2008-05-09 at the Wayback Machine
  3. ^ "Home". ivarjacobson.com.
  4. ISBN 978-3-642-23314-2
    .
  5. S2CID 14451600
    .
  6. ISBN 9780897912471. Retrieved 2020-08-10. {{cite book}}: |website= ignored (help
    )
  7. ^
    OCLC 636807532.{{cite book}}: CS1 maint: others (link
    )
  8. ^ "About the Essence Specification Version 1.2". www.omg.org. Retrieved 2020-08-10.
  9. S2CID 243575665
    .
  10. ^ Ivar Jacobson at DBLP Bibliography Server Edit this at Wikidata

External links

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