John Krogstie
Encyclopedia
John Krogstie is a Norwegian computer scientist
, professor in information systems at the Norwegian University of Science and Technology
(NTNU) in Trondheim, Norway, and an expert in the field of enterprise modelling
.
in 1991 and a PhD
in 1995 both in information systems from the Norwegian University of Science and Technology.
From 1991 to 2000 he was employed as a manager in Accenture
. In 2000-2005 he was a senior researcher in SINTEF. He is a professor in information systems at NTNU in Trondheim, Norway.
John Krogstie is the Norwegian representative for IFIP TC8 and Chair (2010–2012) of IFIP WG 8.1 on information systems design and evaluation, where he is the initiator and leader of the task group for Mobile Information Systems.
.
The SEQUAL framework is a reference model for evaluating the quality of models, the semiotic quality framework (SEQUAL) developed by John Krogstie. The SEQUAL framework is grounded in semiotics
, particularly the semiotic theory of Charles W. Morris
. It builds on semiotic theory and defines several quality aspects based on relationships between a model, a body of knowledge, a domain, a modeling language, and the activities of learning, taking action, and modeling.
Its usefulness was confirmed in an 2002 experiment.
The basic idea behind the SEQUAL framework is, that conceptual model
s can be considered as sets of
statements in a language
, and therefore can be evaluated in semiotic/linguistic terms. A first semiotic framework for evaluating conceptual models was originally proposed by Lindland et al. in the 1994 article "Understanding quality in conceptual modeling". In its initial version, it considered three quality levels:
The framework was later extended, and called the SEQUAL framework by Krogstie et al. in the 1995 article "Defining quality aspects for conceptual models". In the 2002 article "Quality of interactive models" Krogstie & Jørgensen extended the initial framework adding
more levels of Stamper’s semiotic ladder.
Computer scientist
A computer scientist is a scientist who has acquired knowledge of computer science, the study of the theoretical foundations of information and computation and their application in computer systems....
, professor in information systems at the Norwegian University of Science and Technology
Norwegian University of Science and Technology
The Norwegian University of Science and Technology , commonly known as NTNU, is located in Trondheim. NTNU is the second largest of the eight universities in Norway, and, as its name suggests, has the main national responsibility for higher education in engineering and technology...
(NTNU) in Trondheim, Norway, and an expert in the field of enterprise modelling
Enterprise modelling
Enterprise modelling is the abstract representation, description and definition of the structure, processes, information and resources of an identifiable business, government body, or other large organization....
.
Biography
John Krogstie received a MScMSC
- Computers:* Mario Strikers Charged* Microsoft Common Console Document, file for the Microsoft Management Console* Microelectronics Support Centre* Microsoft Corporation* MIDI Show Control* Message Sequence Chart...
in 1991 and a PhD
PHD
PHD may refer to:*Ph.D., a doctorate of philosophy*Ph.D. , a 1980s British group*PHD finger, a protein sequence*PHD Mountain Software, an outdoor clothing and equipment company*PhD Docbook renderer, an XML renderer...
in 1995 both in information systems from the Norwegian University of Science and Technology.
From 1991 to 2000 he was employed as a manager in Accenture
Accenture
Accenture plc is a global management consulting, technology services and outsourcing company headquartered in Dublin, Republic of Ireland. It is the largest consulting firm in the world and is a Fortune Global 500 company. As of September 2011, the company had more than 236,000 employees across...
. In 2000-2005 he was a senior researcher in SINTEF. He is a professor in information systems at NTNU in Trondheim, Norway.
John Krogstie is the Norwegian representative for IFIP TC8 and Chair (2010–2012) of IFIP WG 8.1 on information systems design and evaluation, where he is the initiator and leader of the task group for Mobile Information Systems.
Work
Krogstie's research interests include information systems, conceptual modeling, mobile information systems, eGovernment and enterprise modellingEnterprise modelling
Enterprise modelling is the abstract representation, description and definition of the structure, processes, information and resources of an identifiable business, government body, or other large organization....
.
The SEQUAL framework
Semiotics
Semiotics, also called semiotic studies or semiology, is the study of signs and sign processes , indication, designation, likeness, analogy, metaphor, symbolism, signification, and communication...
, particularly the semiotic theory of Charles W. Morris
Charles W. Morris
Charles W. Morris was an American semiotician and philosopher.-Background:A son of Charles William and Laura Morris, Charles William Morris was born on May 23, 1901...
. It builds on semiotic theory and defines several quality aspects based on relationships between a model, a body of knowledge, a domain, a modeling language, and the activities of learning, taking action, and modeling.
Its usefulness was confirmed in an 2002 experiment.
The basic idea behind the SEQUAL framework is, that conceptual model
Conceptual model
In the most general sense, a model is anything used in any way to represent anything else. Some models are physical objects, for instance, a toy model which may be assembled, and may even be made to work like the object it represents. They are used to help us know and understand the subject matter...
s can be considered as sets of
statements in a language
Language
Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...
, and therefore can be evaluated in semiotic/linguistic terms. A first semiotic framework for evaluating conceptual models was originally proposed by Lindland et al. in the 1994 article "Understanding quality in conceptual modeling". In its initial version, it considered three quality levels:
- syntactic,
- semantic, and
- pragmatic quality
The framework was later extended, and called the SEQUAL framework by Krogstie et al. in the 1995 article "Defining quality aspects for conceptual models". In the 2002 article "Quality of interactive models" Krogstie & Jørgensen extended the initial framework adding
more levels of Stamper’s semiotic ladder.
See also
- Extended Enterprise Modeling LanguageExtended Enterprise Modeling LanguageExtended Enterprise Modeling Language in software engineering is a modelling language used for Enterprise modelling across a number of layers.-Overview:...
- The quality of modelling languagesThe quality of modelling languagesA review of modelling languages is essential to be able to assign which languages are appropriate for different modelling settings. In the term settings we include stakeholders, domain and the knowledge connected...
- View modelView modelA view model or viewpoints framework in systems engineering, software engineering, and enterprise engineering is a framework which defines a coherent set of views to be used in the construction of a system architecture, software architecture, or enterprise architecture. A view is a representation...
Publications
Krogstie has published around 150 refereed papers in journals, books, and archival proceedings since 1991. Books, a selection:- 2005. Information modeling methods and methodologies. With Terry HalpinTerry HalpinTerence Aidan Halpin is an Australian computer scientist who is known for his formalization of the object role modeling notation.- Biography :...
and Keng Siau (editors). - 2007. Conceptual Modelling in Information Systems Engineering. With Andreas Lothe Opdahl and Sjaak BrinkkemperSjaak BrinkkemperJacobus Nicolaas Brinkkemper is a Dutch computer scientist, and Full Professor of organisation and information at the Department of Information and Computing Sciences of Utrecht University.-Biography:...
. - 2008. Active Knowledge Modeling of Enterprises. With Frank Lillehagen. Springer, 2008. ISBN 3540794158
External links
- Homepage at the Norwegian University of Science and Technology (NTNU) in Trondheim, Norway.