October 2012
Intermediate to advanced
696 pages
34h 17m
English
Content preview from Operations Management: An Integrated Approach, 5th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Solved Problems
(See student companion site for Excel template.)
• Problem 1
An office security system at Delco, Inc. has two component parts, both of which must work for the system to function. Part 1 has a reliability of 80 percent, and part 2 has a reliability of 98 percent. Compute the reliability of the system.
• Before You Begin:
Before you begin solving reliability problems, it is best to first draw a diagram of the components. Remember that the system of components is drawn in series, except when there is redundancy built into the system through a backup component. In that case, the backup component is drawn in parallel. Always read the problem carefully to determine whether redundancy is built into the system.
• Solution
The reliability of the system is
Rs = R1 × R2
Rs = (0.80)(0.98) = 0.784
• Problem 2
Delco, Inc., from Problem 1, is not happy with the reliability of its security system and has decided to improve it. The company will add a backup component to part 1 of its security system. The backup component will also have a reliability of 0.80. What is the reliability of the improved security system?
• Before You Begin:
Notice that in this problem there is redundancy in the form of a backup component for part 1. This means that when drawing the diagram you should place the two components for part 1 in parallel. Proceed by computing the reliability for part 1 and then ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.