Ivar Hjalmar Jacobson (born 1939) is a Swedish computer scientist and software engineer, known as major contributor to UML, Objectory, Rational Unified Process (RUP), aspect-oriented software development and Essence.


1 Biography 2 Work

2.1 Ericsson 2.2 Rational Software 2.3 Essential Unified Process 2.4 EssWork 2.5 SEMAT

3 Publications 4 References 5 External links

Biography[edit] Ivar Jacobson was born in Ystad, Sweden on September 2nd, 1939. He received his Master of Electrical Engineering degree at Chalmers Institute of Technology in Gothenburg in 1962. After his work at Ericsson, he formalized the language and method he had been working on in his Ph.D. at the Royal Institute of Technology in Stockholm in 1985 on the thesis Language Constructs for Large Real Time Systems. 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[edit] Ericsson[edit] In 1967 at Ericsson, Jacobson proposed the use of software components in the new generation of software controlled 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. Jacobson saw a need for blueprints for software development. He was one of the original developers of the Specification and Design Language (SDL). In 1975, SDL became a standard in the telecoms industry. At Objectory he also invented use cases as a way to specify functional software requirements. Rational Software[edit] At Rational, Jacobson and his friends, Grady Booch and James Rumbaugh, designed the UML and his Objectory Process evolved to become the Rational Unified Process under the leadership of Philippe Kruchten. Essential Unified Process[edit] In November 2005, Jacobson announced the Essential Unified Process or “EssUP” for short. EssUP was a new “Practice” centric software development process that stood on the shoulders of modern but established software development practices. It was a fresh new start, integrating successful practices sourced from the three leading 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, and IJI have integrated EssUP into Microsoft Visual Studio Team System and Eclipse. EssWork[edit] Standing on the experience of EssUP Ivar and his team, in particular Ian Spence and Pan Wei Ng, developed EssWok 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[edit] 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 sound basis for software engineering practice, and its wide adoption by industry and academia. SEMAT has been inspired by the work at IJI, but it is a fresh new start. It has resulted in Essence, which at the time of this writing has been recommended as an OMG standard. Publications[edit] Jacobson has published several books and articles,[4] a selection:

1992. Object-Oriented Software Engineering: A Use Case Driven Approach (ACM Press) With Marcus Christerson, Patrik Jonsson & Gunnar Overgaard. Addison-Wesley, 1992, ISBN 0-201-54435-0 1994. The Object Advantage: Business Process Reengineering With Object Technology (ACM Press). With M. Ericsson & A. Jacobson. Addison-Wesley, ISBN 0-201-42289-1 1997. Software Reuse: Architecture, Process, and Organization for Business Success (ACM Press). With Martin Griss & Patrik Jonsson. Addison-Wesley, 1997, ISBN 0-201-92476-5 1999. The Unified Software Development Process. With Grady Booch & James Rumbaugh. Addison-Wesley Professional, 1999, ISBN 0-201-57169-2 2004. The Unified Modeling Language Reference Manual (2nd Edition). With Grady Booch & James Rumbaugh. Addison-Wesley Professional, 2004, ISBN 0-321-24562-8 2004. Aspect-Oriented Software Development With Use Cases (Addison-Wesley Object Technology Series). With Pan-Wei Ng. Addison-Wesley, ISBN 0-321-26888-1 2005. The Unified Modeling Language User Guide (2nd Edition). With Grady Booch & James Rumbaugh. Addison-Wesley Professional, 2005, ISBN 0-321-26797-4 2013. The Essence of Software Engineering - Applying the SEMAT Kernel. With Pan Wei Ng, Paul Mc Mahon, Ian Spence and Svante Lidman. Addison-Wesley, 2013, ISBN


^ ^ DBMS Interview - October 1996 Archived 2008-05-09 at the Wayback Machine. ^ [1] ^ Ivar Jacobson at DBLP Bibliography Server

External links[edit]

Wikiquote has quotations related to: Ivar Jacobson

Ivar Jacobson International Ivar Jacobson's Blog EssWork Website

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Software engineers

Victor Basili Kent Beck Grady Booch Fred Brooks Barry Boehm Peter Chen Danese Cooper Ward Cunningham Tom DeMarco Edsger W. Dijkstra Delores M. Etter Martin Fowler Adele Goldstine Margaret Hamilton C. A. R. Hoare Lois Haibt Mary Jean Harrold Grace Hopper Watts Humphrey Michael A. Jackson Ivar Jacobson Alan Kay Nancy Leveson Stephen J. Mellor Bertrand Meyer David Parnas Trygve Reenskaug Winston W. Royce James Rumbaugh Mary Shaw Peri Tarr Elaine Weyuker Niklaus Wirth Edward Yourdon

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Unified Modeling Language



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WorldCat Identities BNF: cb123493792 (data) DBLP: 62/383 GND: 120987139 ISNI: 0000 0001 1478 9573 LCCN: n92061500 NDL: 00514078 SUDOC: 032469551 VIA