Reflection: Who am "I"? What's "my" model?

So I just said:

What's in a system model?  Everything!  Everything "I" am interested in modelling.

And of course the big question there is "who am 'I'?" 

In general terms, I am choosing to interpret "I" as being the "system modeller", the person or people who is/are interested in all aspects of the system's design, all perspectives that may help them understand, design and communicate what the system will be, what it will look like, how it will fit in with the wider world, how it will be used (or use) other systems... and not forgetting how it works with it's human users.

But that's an enormous undertaking; certainly without the ideas of "something of everything" and "views and viewpoints" (coming next...) it would be.  Even with these aids though, it's almost inevitable that the system modeller will decide to focus, from time to time on some specific aspect of the design - they may even delegate some part of the work to a designer who specialises in one of those aspects.

What is it that that specialist works with?  A partial model?  No, not from their point of view - they are working on a "complete model" too, it's just that their complete model "only" covers part of the bigger whole; whether it be one particular viewpoint of the whole system, or maybe on particular part of the system.

So, while I talk about "the" system model, and indeed it's that which I am most interested in - the complete system design model, please bear in mind that "model" can address any scope or area of interest, so long as everyone understands its purpose - by which I mean the viewpoint(s) it's authors and observers are interested in.

Maybe I need to talk about "viewpoints"...