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System Design & Performance > Seeing it, and paying for itA cost model on one page
Phase 06Seeing it, and paying for it323 of 434

A cost model on one page

A single sheet: assumptions, unit costs, the total at one thousand, one hundred thousand and one million users, and which line dominates at each.

Build40 minAI implements

Build this in your own editor

This one runs on your machine rather than in the browser workbench. Work to the outcomes below, then come back and mark it complete.

You should now be able to

  • Build a parameterised cost model for your own system
  • Find the volume at which the dominant cost changes
  • State a cost per active user
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