Reliability is an element of the concept of availability. Reliability is a measu
ID: 3903341 • Letter: R
Question
Reliability is an element of the concept of availability. Reliability is a measure of how long a service, component, or configuration item performs its agreed function without interruption. One measure used to describe reliability is the mean time between failure (MTBF). When calculating MTBF, the time between failures is the time from when the configuration item starts working until it next fails. A food truck locator service that is supposed to operate 24 hours per day, 7 days per week had an incident of downtime on a Thursday, and the service was restored at 2:33 PM on that day. Then the service operated fine for 7 weeks after that, failing on the following Wednesday at 4:28 PM. What is the time between failure calculated from this information? Show your work and report your answer in either hours rounded to two decimal places, days rounded to two decimal places, or minutes rounded to two decimal places.
Explanation / Answer
Answers is as follows:
We know that the failure gap is 7 weeks, so there are 7 days in each week. So the total days are 7 * 7 = 49.
but we have failure on follwing wednesday so there one more week added so total days are 49 + 7 = 56
But if excluding thursday, on which service restored and wednesday on which failure occur than remaning days are 54.
And on thrusday the service is restore on 2.33 PM i.e. equal to 14.33 so from this time to 12.00 AM we get 14.55 hours.
And on wednesday the failure occur at 4.28 PM i.e. 16.28 so from 12.00 AM to 16.28 we get 16.28 hours.
And in 54 days we have 1128 hours.
So total hours we get 1296+ 14.55 + 16.28 = 1326.83
So from this we get Time between failur in hours is 1326.83 hours.
From this we get no of weeks are 7.89 weeks.
and in minutes the answer is 79609.80 minutes.
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