Probability and statistics
21.1 Introduction
Consider a system of computers and communication networks supporting a bank's cash dispensing machines. The machines provide instant money on the street on production of a cash card and a personal identification code with the only prerequisite being that of a positive bank balance.
The communication network must be reliable – that is, not subject too often to break downs. The reliability of the system, or each part of the system, will depend on each component part.
A very simple system, with only two components, can be configured in series or in parallel. If the components are in series then the system will fail if one component fails (Figure 21.1).
Get Mathematics for Electrical Engineering and Computing now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
