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Software Fortresses: Modeling Enterprise Architectures by Janet Van Sickler, Roger Sessions

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15.1. Ten Important Points about Software Fortresses

Let's start by reviewing the basics of the software fortress model. This much of the model should be familiar to everybody in your organization, from the CTO to the end user:

  1. The software fortress is a trust boundary. Everybody in the fortress trusts everybody else in the fortress, and nobody in the fortress trusts anybody outside the fortress.

  2. The software fortress consists of many close-knit systems, machines, and processes. These systems, machines, and processes work together to solve a significant business problem, such as accounts payable.

  3. Every fortress has one or more places where fortress-critical data is stored. These are collectively referred to as data strongboxes.

  4. Every fortress is ...

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