Question

Question 3
Derek is disappointed in his high-speed Internet service. Although the
Internet is seldom down, it kicks into slow mode quite often, which
Derek considers to be a failure. He has tried three service providers
with varying degrees of success. The number of failures in a typical
eight-hour day and the average time to regain high-speed service are
shown below. Derek must choose one of the following options.
Calculate the system availability for each option. Which service would
you recommend?
ISP
Xceptional
Yourizon
Zelltell
Number of Failures
12
4
3
Time to regain service
2 minutes
4 minutes
NOTES
10 minutes
COMMENTS
19
12:45 PM
82% X

Answer 1

Among all the available services Derek should give priority to Yourizon because it has minimum wastage of time.

Given that Derek has three options in getting internet service and number of failures is given, time to regain service is also given.

We are required to find the appropriate internet service that Derek should avail.

The services, number of failures and time to regain service are:

Service             Number of failures             Time to regain service

ISP                          12                                          2 minutes

Yourizon                   4                                           4 minutes

Zelltel                       3                                           10 minutes

The wastage of time is as under:

Service                                Time wastage

ISP                                     12*2=24 minutes

Yourizon                              4*4=16 minutes

Zelltel                                  3*10=30 minutes

We have found that the minimum wastage is happening in Yourizon so Derek shoul avail Yourizon.

Hence among all the available services Derek should give priority to Yourizon.

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