CMN 201 Study Guide - Standard Deviation, Exponential Distribution, Mean Time Between Failures

• School: Ryerson University
• Department: Communication
• Course: CMN 201
• Professor: Ross Mc Naughton

Document Summary

After completing this module, you should be able to: Explain the purpose of redundancy in a system. Reliability: the ability of a product, part or system to perform its intended function under a prescribed set of conditions. Reliability is measured as the probability that an item will function as intended. Failure is when the product, part or system does not function. Each time you turn the start mechanism on your car you expect it to start. Similarly when you press the on button on your cell phone, you expect it to turn on. If an item is switched on 100 times and it functions 95 times but fails to turn on 5 times, then the item"s reliability is . 95 or 95%, i. e. , it turns on 95% of the time. The same item"s failure rate is . 05 or 5%, i. e. , it fails to turn on 5% of the time.