---
title: John Krogstie
type: entity
tags: [person, academic, conceptual-modelling, sequal, ntnu]
sources: ["[[sources/2006-krogstie-sindre-jorgensen-revised-sequal-framework]]"]
created: 2026-05-04
updated: 2026-05-04
---

# John Krogstie

Professor of Information Systems at NTNU (Norwegian University of Science and Technology), Trondheim. Long-time editor and extender of the SEQUAL framework for conceptual-model quality.

## Affiliation
- NTNU, IDI (Department of Computer and Information Science) — current.
- SINTEF ICT — senior advisor; previously employed 1991–2000 at Accenture.
- Ph.D. (1995) from University of Trondheim; M.Sc. (1991) from NTNU.
- Norwegian representative for IFIP TC8; vice-chair of IFIP WG 8.1 (Information Systems Design and Evaluation).

## Why he matters here
Co-author of the **revised SEQUAL framework** ([[sources/2006-krogstie-sindre-jorgensen-revised-sequal-framework]]) — the theoretical scaffolding for what conceptual-model quality even means. SEQUAL underpins the syntactic/semantic/pragmatic tripartite that BPM textbooks (Dumas et al.) distil for practitioners.

His doctoral thesis (1995, Trondheim) and successive extensions (Krogstie et al. 1995; Krogstie & Jørgensen 2002; this 2006 paper) built the framework outward from Lindland-Sindre-Sølvberg's 1994 original to cover all eight levels of Stamper's semiotic ladder, then re-anchored it for active/interactive process models in 2006.

## Contributions to BPM quality discourse
- Active-model framing: models that change the reality they describe.
- Articulation/activation dynamic — anticipates the read/write loop of agentic-BPM execution.
- Three-flavour semantic quality (descriptive vs prescriptive vs perceived) — maps onto BPM's as-is vs to-be modelling.

## Related
[[entities/guttorm-sindre]] (co-author) · [[entities/havard-jorgensen]] (co-author) · [[concepts/sequal-framework]] · [[concepts/process-model-quality]]