Kimsia

Software architecture is a manifestation of the earliest design decisions about a system, and these early bindings carry enormous weight with respect to the system’s remaining development, its deployment, and its maintenance life. It is also the earliest point at which these important design decisions affecting the system can be scrutinized.

Every architecture, no matter what it is, partitions possible changes into three categories: local, nonlocal, and architectural.

• A local change can be accomplished by modifying a single element—for example, adding a new business rule to a pricing logic module.


• A nonlocal change requires multiple element modifications but leaves the underlying archite

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“In the past, jobs were about muscles. Now they’re about brains, but in the future, they’ll be about the heart.”

Many systems are built as skeletal systems that can be extended using plug-ins, packages, or extensions. Examples include the R language, Visual Studio Code, and most web browsers.