Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Why we calculate MTBF & MTTR ?

Why we calculate MTBF & MTTR ?

Why we calculate MTBF & MTTR ?


I have simple question, why we calculate MTBF & MTTR ?


RE: Why we calculate MTBF & MTTR ?

Well, i asked the question because i really don't know why it should be calculated !

I mean, is calculated because it gives an indication of the next expected failure ?!

I simply, don't know :)

RE: Why we calculate MTBF & MTTR ?

So, what if the MTBF is small ?
What are the basic steps to correct it ?


RE: Why we calculate MTBF & MTTR ?

A small MTBF means high failure rate.  So, you either replace the high failure rate components with more reliable ones, or redesign the system to use something else.

This all could have been inferred from the available material and literature on the web.


FAQ731-376: Eng-Tips.com Forum Policies

RE: Why we calculate MTBF & MTTR ?

Thanks IRstuff

Now, i got it.

RE: Why we calculate MTBF & MTTR ?


Basically, MTBF and MTTF are aimed at quantifying life statistics for a given product or system.  They are useful for identifying weak links in a design, or for looking at the effects of temperature or electrical stress.  They sometimes are requested (required) by customers.

As mentioned, there are a number of online discussions of these, and other topics in Reliability Engineering.  You have indicated an interest in getting in to reliability engineering.  One of the software vendors who has a lot of good material is:

I work in a reliability engineering consulting group,
 (We offer a number of training modules)

Go check out these sites.

Also, join ASQ.org .  They have good materials, and you can get certified (e.g., CRE;  discussed elsewhere in this forum.).

Also, go get a book on reliability engineering.  Here are a couple of suggestions:

Practical Reliability Engineering
 Patrick D. T. O'Connor
   (a classic;  bit expensive, but very good. Get at Amazon.com)

Halt, Hass, and Hasa Explained: Accelerated Reliability Techniques  by Harry W. McLean
  (Get at ASQ.com; cheaper there than Amazon )

Contact me if you would like to discuss further.

John Cooper, CRE


John Cooper, ASQ CRE

RE: Why we calculate MTBF & MTTR ?

Thank you John. I really appreciate your help.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close