IVAR HJALMAR JACOBSON (born 1939) is a Swedish computer scientist and
software engineer , known as major contributor to UML ,
Rational Unified Process
Rational Unified Process (RUP), aspect-oriented software development
* 1 Biography
* 2 Work
Essential Unified Process
* 2.4 EssWork
* 3 Publications
* 4 References
* 5 External links
Ivar Jacobson was born in
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
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 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
Ericsson in 1991, and the company was renamed
. 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,
and Jacobson started working with
Grady Booch and
James Rumbaugh ,
known collectively as the Three Amigos.
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) which
operates across three continents with offices in the UK, the US,
Sweden, Switzerland, China, and Singapore.
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
Objectory he also invented use cases as a way to specify
functional software requirements.
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
Rational Unified Process under the leadership of Philippe Kruchten.
ESSENTIAL UNIFIED PROCESS
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
Ivar has described EssUP as a "super light and agile" RUP, and IJI
have integrated EssUP into
Visual Studio Team System and
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.
In November 2009, Jacobson,
Bertrand Meyer and
Richard Soley ("the
Troika") started an initiative called
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.
Jacobson has published several books and articles, 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
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
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 ">
* ^ DBMS Interview - October 1996
Ivar Jacobson at