# Series and parallel system reliability
# Scope: Independent binary component reliabilities; two-component series and parallel alternatives.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

reliabilityA = 0.95
reliabilityB = 0.9

series := reliabilityA*reliabilityB
parallel := 1-(1-reliabilityA)*(1-reliabilityB)

check parallel target: parallel >= 0.99

scenario alternative: reliabilityA = 0.76