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Topics - mikewhit

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General Board / Diagram paper colour for Project
« on: October 20, 2004, 01:36:16 am »
I can see how to set colours for diagram elements in a Project: Project - Set Project Custom Colors, and how to set the diagram paper (background) colour for a user on a given PC: Tools - Options - Standard Colors.

But is it possible to set the paper colour on a Project basis, if not, why not ?

I am working on a snapshot copy of a project, and would like a visual reminder that I'm editing the copy and not the original, and diagram background colour seemed to be the best visual clue - until I found I couldn't set it for the Project !

Uml Process / Modelling variants - anyone ?
« on: February 15, 2005, 05:58:46 am »
Of course I've Googled, but does anyone have any experience of EA modelling a project with variants?

By this I mean a family of products/systems which share a common set of components, or architecture, but which differ in some organised way.

For example, an electricity meter might exist in single-phase / three-phase and domestic / industrial variants.
It might also have current transformer / Hall-effect sensor variants.

Many of the components (and requirements) would be the same, but some might be slightly or completely different,  or only differ in multiplicity.

You wouldn't really want a completely different model for each variant, not if you wanted to avoid mistakes and enhance design reuse.

My first thought would be to work backwards from a component model of each variant ...

Uml Process / EA Help file on Choices / Junctions
« on: December 09, 2004, 06:21:53 am »
Having been quizzed by a colleague on when to use a Choice and when to use a Junction in a State diagram, I did some reading around.

The EA Help file is not very illuminating on this, just referring to dynamic (C) or static (J) guard conditions.

However, Douglass (Real Time UML, pub Addison Wesley) says that a Choice point is a kind of junction that executes its action list before going on to the next transition segment.

This is presumably from 'classical' state machine terminology, where states are linked by transitions that have events(triggers), guards and actions.

When a trigger occurs, the actions on the transition on which the guard is TRUE are executed.

Douglass goes on to dissuade us from using Choices, on the grounds that you might execute your actions and then find out your guards were all FALSE.

Still, it would be "helpful" if the EA Help file could be a little more forthcoming on this otherwise confusing detail !

Uml Process / Hardware deployment
« on: February 18, 2005, 03:50:51 am »
The Deployment diagram specifically states that Nodes are 'processing elements'.

However, for documentation purposes, I would like to explicitly include some of the other hardware environment in a diagram (IO capability, attached peripherals), as diagram elements, rather than just as fields within the node. As embedded nodes, probably.

Any other/better suggestions ?

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