Monday, October 27, 2014

The architecture thing...

So, we occasionally get silliness from serious people:

" ......  many enterprise architects spend a great deal of their time creating blueprints and plans based on frameworks.  The problem is,  this activity rarely leads to anything of genuine business value because blueprints or plans are necessarily:

Incomplete – they are high-level abstractions that omit messy, ground-level details. Put another way, they are maps that should not be confused with the territory.

Static – they are based on snapshots of an organization and its IT infrastructure at a point in time.

Even roadmaps that are intended to describe how organisations’ processes and technologies will evolve in time are, in reality, extrapolations from information available at a point in time.
The straightforward way to address this is to shun big architectures upfront and embrace an iterative and incremental approach instead"

That passage is dubious, as any real architect knows, though not all wrong, to be sure:
  • Yes, frameworks are often more distraction than value-add; personally, I don't go for them
  • Yes, if your blueprints are pointing to something of no business value, then if that is really true, change them or start over... simple common sense ... but let it said: you can describe business value on a blueprint!
  • No, high level abstractions actually are often quite useful, starting with the narrative or epoch story or vision, all of which are forms of architecture, all of which are useful and informative. It's called getting a view of the forest before examining trees.
  • Yes, abstractions hide detail, but so what? The white box can be added later
  • Yes, roadmaps obsolesce. Yes, they have to be kept up to date; yes, sometimes you start on the road to nowhere. So what? If it doesn't work, change it. 
I think the agile principle "... the best architecture emerges ..." which is silliness writ large is the influence. We should put that aside, permanently. Why: because many small scale architectures simply don't scale.

Take, as just one example a physical story board or a Kanban board of sticky notes in a room somewhere. That architecture works well for a half dozen people. Now, try to scale that for half a hundred... it really doesn't scale. The technology doesn't scale.. you need an electronic database to support 50 people; the idea of all independent stories doesn't scale unless you add structure, communications, protocols, etc, all of which are missing or unneeded at small scale.

To the rescue: Here's another recent passage from another serious person who has a better grip:

One conjecture we arrived at is that architects  typically work on three distinct but interdependent structures:

  1. The Architecture (A) of the system under design, development, or refinement, what we have called the traditional system or software architecture.
  2. The Structure (S) of the organization: teams, partners, subcontractors, and others.
  3. The Production infrastructure (P) used to develop and deploy the system, especially important in contexts where the development and operations are combined and the system is deployed more or less continuously.

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