GMS 401 Lecture 3: Week 3 gms
28 Oct 2017
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Lam 1 (0. 90) lamp 2 (0. 80) ps=0. 90 x 0. 80= 0. 72. The reliability of the system as a whole is less than the reliability of the individual components. Lam 1 (0. 90) lamp 2 (0. 80) lamp 3 (0. 75) ps=0. 90 x 0. 80x0. 75= Improving individual components (eg, use more durable material: providing redundancy (providing back up components, design simplification (reduce # of components) Example 1: if there are 2 lamps in a room. When turned on, one has a probability of working of . 90 and the other has a probability of working of . 80. Only a single lamp is needed for success. Therefore, one of the lamps is a backup in case the other one fails. The probability of success is: ps= 1- (1-0. 90) x (1-. 80) = 0. 98. The reliability of the system as a whole is greater than the reliability of individual components of the system. Example 2: lamp 1 (0. 90) lamp 2 (0. 80) lamp 3 (0. 70): ps.
