John Krogstie (born 23 May 1967) is a Norwegian

computer scientist A computer scientist is a scientist who specializes in the academic study of computer science. Computer scientists typically work on the theoretical side of computation. Although computer scientists can also focus their work and research on ...

, professor in information systems at the

Norwegian University of Science and Technology The Norwegian University of Science and Technology (NTNU; ) is a public university, public research university in Norway and the largest in terms of enrollment. The university's headquarters is located in Trondheim (city), Trondheim, with region ...

(NTNU) in Trondheim, Norway, and an expert in the field of

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. It deals with the process of underst ...

Biography

John Krogstie received a MSc in 1991 and a

PhD A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of graduate study and original research. The name of the deg ...

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 plc is a global multinational professional services company originating in the United States and headquartered in Dublin, Ireland, that specializes in information technology (IT) services and management consulting. It was founded in 1 ...

. 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 was Chair (2010–2015) of IFIP WG 8.1 on information systems design and evaluation.

Work

Krogstie's research interests include information systems, conceptual modeling, mobile information systems, eGovernment and

The SEQUAL framework

The SEQUAL framework is a reference model for evaluating the quality of models, the semiotic quality framework (SEQUAL) developed by John Krogstie.John Krogstie et al. (2006)
"Process models representing knowledge for action: a revised quality framework"
In: '' European Journal of Information Systems'' (2006) 15, pp.91–102. The SEQUAL framework is grounded in

semiotics Semiotics ( ) is the systematic study of sign processes and the communication of meaning. In semiotics, a sign is defined as anything that communicates intentional and unintentional meaning or feelings to the sign's interpreter. Semiosis is a ...

, 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.Jan Mendlin et al. (2006
"On the Correlation between Process Model Metrics and Errors"
Conference paper. Its usefulness was confirmed in a 2002 experiment. The basic idea behind the SEQUAL framework is, that

conceptual model The term conceptual model refers to any model that is formed after a wikt:concept#Noun, conceptualization or generalization process. Conceptual models are often abstractions of things in the real world, whether physical or social. Semantics, Semant ...

s can be considered as sets of statements in a

language Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...

, 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.

Perspectives to Process Modeling, 2013

In the 2013 article ''Perspectives to Process Modeling'' a review is presented of business process modeling; first describing the main approaches of process modeling which are then classified according to the main modeling perspective being used with modeling perspectives namely the: behavioral, functional, structural, goal-oriented, object-oriented, language action, organizational and geographical.

Publications

Krogstie has published around 150 refereed papers in journals, books, and archival proceedings since 1991.See als
John Krogstie
''scholar.google.no'' Books, a selection: * 2005. ''Information modeling methods and methodologies''. With

Terry Halpin Terence Aidan (Terry) Halpin (born 1950s) is an Australian computer scientist who is known for his formalization of the object–role modeling notation. Biography Born in Australia, Halpin studied at the University of Queensland starting in ...

and Keng Siau (editors). * 2007. '' Conceptual Modelling in Information Systems Engineering''. With Andreas Lothe Opdahl and Sjaak Brinkkemper. * 2008. ''Active Knowledge Modeling of Enterprises''. With Frank Lillehagen. Springer, 2008.

References

External links

Homepage
at the Norwegian University of Science and Technology (NTNU) in Trondheim, Norway. {{DEFAULTSORT:Krogstie, John 1967 births Living people Accenture people Enterprise modelling experts Information systems researchers Norwegian computer scientists Norwegian University of Science and Technology alumni Academic staff of the Norwegian University of Science and Technology Software engineering researchers