Читать книгу System Reliability Theory - Marvin Rausand - Страница 116

At a given time, an item may be in one out of several states. The functions performed in one state may be different from the functions performed in other states. The item changes state by a transition. The transition may be automatic or manual and may occur at a random time or as a result of a command. Complicated items may have a high number of states and transitions.