Weibull Python, Survival Analysis Python, Time To Failure Python, Parametric Survival, Hjorth Python.
rate of the system is the sum of the individual failure rates. If these are the same for all N components, then the system (our space ship) will exhibit a failure rate of N * lambda, also following an exponential distribution. Its mean time till failure MTTF will be the inverse, 1 / (N*lambda).