The Efficiency of N Machines Uni-Directionally Patrolled by One Operative When Walking Time and Repair Times are Constants
Charles H. Mack, T. Murphy, N. L. Webb · Journal of the Royal Statistical Society Series B (Statistical Methodology) · 1957
Summary The solution is given to the problem of determining the efficiency of N machines looked after by an operative who walks round them in one direction, always taking the same time to walk to a given machine from the previous one and to inspect it and service it (we call this overall time the “walking time”), and then, if the machine has stopped, taking a fixed time to repair it.