Tag Archives: Modelling

The Killer Application of Software Modelling

From my experience as a business analyst (BA) I would say: checking or transforming models is interesting and important, but the real killer application of a model in software development is (simply) talking about it. Continue reading

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A simple relational Model

Modelling foundations: What does a simple diagram ‘thing – relation – thing’ say, in terms of logic? Continue reading

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Categories of semantic Models by Stachowiak

Categorisation by example of semantic models, i.e. models as we use them in software engineering etc, according to Herbert Stachowiak. Continue reading

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Unambiguous Requirements Models

We’ll see that the concept of ambiguity of (requirements in software engineering) models comprises structural as well as material aspects, on all model levels (top to bottom). Continue reading

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Stachowiak on semantic Requirements Modelling

Excerpt of Herbert Stachowiak’s “Allgemeine Modelltheorie” (General Model Theory). Although this is on empirical-scientific models, it provides a foundation of semantic requirements modelling. Continue reading

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Modelling with Classes: Square and Rectangle revisited

Classic problem in class-modelling: how to express that a square is a special kind of rectangle? In order to deepen understanding, let us scrutinize the situation a bit closer here, using logical/ structural foundations of modelling: Continue reading

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Reflections on Abstractions: Roaming the Subsumption Continuum

We make the step from basic kinds of subsuming abstractions to real world modelling problems, by introducing the subsumption continuum. Continue reading

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Craftsman or Engineer?

A lot has been written on the differences between Craftsman and Engineer. Recently I came across a simple example by Hofstadter & Sander, that nicely shows the basic difference in thinking: Continue reading

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Reflections on Abstractions: Subsumption I

We’re going to look at a subsumptional mapping from lhs original to rhs model. We will get four cases of subsumption as in figure (strictest cases), which now can be developed into a continuum with the four cases as corner points. Continue reading

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Modelling explained (to Journalists)

In journalism dog bites man or man bites dog, makes a big difference. In modelling it’s the same entities with the same relation, just in different directions. Continue reading

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