Repair Rate Availability

Problem

Steady-state availability of a two-state system with failure rate lam and repair rate mu:

A = mu / (lam + mu).

Return 0.0 for mu <= 0 or lam < 0.

Hint

Faster repairs relative to failures raise availability.

case 1

in: [1,1]

expected: 0.5

case 2

in: [1,3]

expected: 0.75

case 3

in: [0,2]

expected: 1

case 4

in: [1,0]

expected: 0

Starter codePython

def repair_rate_availability(lam, mu):
    # Your code here
    pass

4 test cases · run your code against them in the editor