When Design-time Becomes Redesign-time

August 06, 2008 Data & AI

I continue to be surprised by the number of enterprise architects I talk to that think that the way to implement design-time governance is to have a checkpoint, before a service goes into production, to validate the service meets the requirements and rules.

The key problem with this approach is that it's already too late.  By the time a service is ready to be deployed, it's well past "design-time" (technically, it's actually "deployment time").  So, one of two things happen: The service meets the requirements so it can go ahead, or it doesn't. If it doesn't, it's back to the drawing board for a redesign (or the project gets deployed anyways because it's more important than following the rules set by the enterprise architect).

While it's definitely valuable to have deployment-time validation "checkpoint," you shouldn't confuse this with design-time.  Real design-time SOA governance happens when the service is being designed (surprise!), so that you avoid problems before they are baked in and expensive to change.

If your design-time governance approach consists only of checkpoints at deployment-time, you should really call it what it is: "redesign-time governance".

dan foody

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