Dependability describes how well and how long a system operates. It has analytical foundations in measurement science and stochastic processes. This short appendix only serves to whet your appetite for much more in-depth studies found in the recommended reading.
Dependability has the following components:
Reliability is defined as the probability that the system will fully and correctly operate for a specified continuous time duration under specified conditions. If anything fails or degrades, then the system is considered to have failed. Reliability is an “all-or-none” ...