Before revision: When μ >> λ, the preceding formula is often approximated to: Q = λ / μ Calculations using unavailability Often fault trees and reliability block diagrams will use unavailability of the various components in the calculation of the top level failure rates .
After revision: through AND gates or parallel redundant componentsWhen μ >> λ, the preceding formula is often approximated to: Q = λ / μ Calculations using unavailability Often fault trees and reliability block diagrams will use unavailability of the various components in the calculation of the top level failure rates .