Availability Composition Calculator
Supply 1–100 availability values from 0–100% for the same period, and a period >0 to 1,000,000 hours. Assume independent component states. Series requires every component: A=product(Ai). Parallel needs any one component: A=1−product(1−Ai), with perfect switching and no shared dependencies. Expected unavailable hours=T×(1−A). Correlated failures and switching delays are excluded. This is a probability model, not a service SLA recommendation.
A QUICK WALKTHROUGH
How to use this tool
- Supply 1–100 availability values from 0–100% for the same period, and a period >0 to 1,000,000 hours. Assume independent component states. Series requires every component: A=product(Ai). Parallel needs any one component: A=1−product(1−Ai), with perfect switching and no shared dependencies. Expected unavailable hours=T×(1−A). Correlated failures and switching delays are excluded. This is a probability model, not a service SLA recommendation.
- Calculate
Availability Composition Calculator
Supply 1–100 availability values from 0–100% for the same period, and a period >0 to 1,000,000 hours. Assume independent component states. Series requires every component: A=product(Ai). Parallel needs any one component: A=1−product(1−Ai), with perfect switching and no shared dependencies. Expected unavailable hours=T×(1−A). Correlated failures and switching delays are excluded. This is a probability model, not a service SLA recommendation.
Inputs stay in this browser; nothing is sent.
Inputs stay in this browser; nothing is sent.
GOOD TO KNOW
Common questions
Availability Composition Calculator
Supply 1–100 availability values from 0–100% for the same period, and a period >0 to 1,000,000 hours. Assume independent component states. Series requires every component: A=product(Ai). Parallel needs any one component: A=1−product(1−Ai), with perfect switching and no shared dependencies. Expected unavailable hours=T×(1−A). Correlated failures and switching delays are excluded. This is a probability model, not a service SLA recommendation.