How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask lifesaver Your Own Question

lifesaver
lifesaver, Computer Software Engineer
Category: Programming
Satisfied Customers: 5962
Experience:  Several years of intensive programming and application development experience in various platforms.
16528259
Type Your Programming Question Here...
lifesaver is online now
A new question is answered every 9 seconds

calculate the availability of a server with an MTBF of 28 weeks

Resolved Question:

calculate the availability of a server with an MTBF of 28 weeks and an MTTR of 504 hours
Submitted: 4 years ago.
Category: Programming
Expert:  lifesaver replied 4 years ago.
Hello and welcome to JustAnswer. I look forward to assisting you today with your question and providing the best answer possible.

Here's you answer

 

 

Given, Mean Time between Failure (MTBF) = 80 hours

Mean Time To Recovery (MTTR) = 72 hours

We have Availability = MTBF / (MTBF + MTTR)

= 80 / (80 + 72)

= 80 / 152

= 0.526

= 52.6%

 

So The server is available 52.6% of the time.



Remember, if for any reason you are unsatisfied with my answer, we can continue the conversation until you’re satisfied and Accept my answer. I can address follow up questions at no extra charge and I’m always here to help. Thank you for using JustAnswer!
Customer: replied 4 years ago.
where do you get the numbers 80 and 72 from?
Expert:  lifesaver replied 4 years ago.

Sorry.typo..the formula remains same though.

 

MTBF = 28 weeks = 28*7 days = 28*7*24 hours = 4704 hours

and an MTTR of 504 hours

 

 

Availability = MTBF / (MTBF + MTTR)

= 4704/ (4704+504) = 4704 / 5208

= .9032

 

= 90.32%

 

Hope this clarifies your doubts.

 



Remember, if for any reason you are unsatisfied with my answer, we can continue the conversation until you’re satisfied and Accept my answer. I can address follow up questions at no extra charge and I’m always here to help. Thank you for using JustAnswer!
lifesaver and other Programming Specialists are ready to help you
Customer: replied 4 years ago.
Thanks a Million
Expert:  lifesaver replied 4 years ago.
Welcome..