Formal framework: Interface design

• Interface between layers is also called the “architecture”

  • Use abstractions to hide complexity
  • Allows a subroutine abstraction between a layer and its adjacent layers.

• Interface design crucial because interface outlives the technology used to implement the interface.

• Driven by three factors:

  • Functionality (what features the customer wants)
  • Technology (what’s possible. Building blocks and techniques)
  • Performance (How fast etc… User, Designer, Operator)

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