... of this robot‐safety system is shown in Figure 1 and its corresponding state space diagram is presented in Figure 2 . The numerals and letters i in the boxes of Figure 2 denote system states. Robotics Mean time between failures Mean time to repair Service failures Product reliability...

... Limited 1996 Mean time to repair Methods time measurement During the past two decades a substantial body of literature has developed on maintenance policies. Interest for the development of policies has come largely from the practical problems of complex systems, such as communication...

..., S₄, S_{6) E‐: Complementary set of E X, Y: Random variables representing failure and repair times of the failed unit respectively Mean time to repair Methods time measurement Stochastic modelling Repairable redundant systems have}...