What a fault costs

Worked examples, recomputed

Every number the mechanisms quote for this relationship is recomputed from it, so none of them disagrees with it.

• 20,000 per hour × 8 h = 160,000
• detection 6 h → 1 h saves 100,000; halving repair saves 10,000

Where it appears

Each mechanism states it in its own names. The general symbol each name stands for is shown with it.

• Observability & Operations

  What is the smallest description of a running system from which we can find a fault, fast enough to matter, at a cost we can still pay while the system is failing?

  $$\text{damage rate}\times (\text{detect}+\text{decide}+\text{repair})$$

  Read it in place →