10 years, 7 months ago

On layers in enterprise-architecture

How many layers are there in an enterprise-architecture? If we read any of the standard texts, you’ll see there are several popular answers. For example, Archimate says there are three: Business, Application and Technology. TOGAF says there are four: Business, Data,

11 years, 4 months ago

Arguing with Mendeleev

@JohnZachman insists that his classification scheme is fixed—it is not negotiable. Comparing his Zachman Framework with the periodic table originally developed by Dmitri Mendeleev, he says, “You can’t argue with Mendeleev that he forgot a column in the periodic table”.

Well, actually, you can. If you look at the Wikipedia article on the Periodic Table, you can see the difference between Mendeleev’s original version and the modern version. Modern chemists now use a periodic table with 18 columns. As Wikipedia states, “Mendeleev’s periodic table has since been expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behavior.”

What makes chemistry a science is precisely the fact that the periodic table is open to this kind of revision in the light of experimental discovery and improved theory. If the same isn’t true for the Zachman Framework, then it can hardly claim to be a proper science.

Some observers have noted that early versions of the Zachman Framework had fewer columns, and see this as a sign that the number of columns may be variable and open to discovery. But the Zachmanites reject this; they say that the six columns have always existed, it was just that the early presentations didn’t mention them all. “Humanity for the last 7,000 years has been able to work with what, how, who, where, when, and why.” (This sounds like a Just-So-Story – “How the Enterprise Architect Got His Toolset”)

Mr Zachman has a degree in chemistry, so he ought to understand what makes the Periodic table different from his own framework. However, some of his followers are less cautious in their claims. I found an article by one Sunil Dutt Jha, whose “proof” of the scientific nature of EA seemed to rely on two key facts (1) that Mendeleev transformed alchemy into chemistry by creating the periodic table, and (2) that the Zachman framework looks a bit like the periodic table, therefore (3) EA must be a science too.

An earlier version of this comment was posted on Linked-In Is it true to say that “Enterprise Architecture” is a scientific basis for creating, maintaining and running an Enterprise?

Erecting the Framework (Feb 2004) – John Zachman discussing his Zachman Framework for Enterprise Architecture in an interview with Dan Ruby

John P. Zachman, The Zachman Framework Evolution (2009-2011)

Sunil Dutt Jha, Biggest myth – “Enterprise Architecture is a discipline aimed at creating models” (January 2013)

See also 

Richard Veryard, Satiable curtiosity (September 2009)

Alan Wall, Pattern Recognition and the Periodic Table (March 2013)

Link added 24 March 2013

11 years, 8 months ago

Metaframeworks in practice, Part 1: Extended-Zachman

What ontology-frameworks do we need, to make sense of the enterprise-architecture of a logistics-business? This is the first of five worked-examples of metaframeworks in practice – on how to hack and ‘smoosh-together’ existing frameworks to create appropriate tools to help

11 years, 8 months ago

From AS-IS to TO-BE

Architects produce many types of models. One useful distinction is between AS-IS models (which describe the current situation) and TO-BE models (which describe some projected future situation). If we can compare an AS-IS model with a TO-BE model, we ca…

11 years, 11 months ago

Transformative Enterprise Architecture Framework – Connecting Strategy – Tactical (Operational) – Execution (Implementation)

Defeat Darwinian Enterprise Model that is Adaptive, rather strive to achieve Generative Model that is transformative creating rich diversity from minimal sets. Connect – Strategy – Architecture / Operations – Implementation

12 years, 2 months ago

Just Enough Detail

The real art of enterprise-architecture, and perhaps its hardest challenge, is in presenting the right level of detail. Not too little, not too much, but just enough. Just Enough Detail. To which people will, of course, immediately ask, “Okay, but how much detail is ‘Just Enough Detail’?”. And I’ll have to admit that there isn’t […]