Design principles

• Keep It Simple

  • Redundancy is bad
  • “it’s a nice idea” is too weak a criteria: only put in what’s essential
  • Complex=hard to build, test, debug, tune, explain

• Use What Works

  • Its easier to add something later when you figure out the answer
  • Than it is to plaster over a mistake that creates a legacy
  • Unnecessary risk increases chance of failure