Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Annual Failure Rate calculation

Posted on 2014-04-24
4
Medium Priority
?
3,325 Views
Last Modified: 2014-04-24
Experts,

I need assistance on what is the best way to present a device's annual failure rate.

I am reporting on devices by each month.  Fields are the following:

Month_year       Device_Name     Total Device        Failure Total     Failure Percentage
2014-01                3050 HDC         29559                      184           0.0747
2014-02                3050 HDC         30053                         55           0.022
2014-03                3050 HDC         30388                         21           0.0083

I only have data from January 2014, so I average the failure Percentage field?  Or calculate (sum (failure total) / sum (total device)) *100
Or something else..

Thanks
0
Comment
Question by:Maliki Hassani
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 20

Expert Comment

by:Russ Suter
ID: 40020739
I'm not getting the same numbers you are.

According to my calculations the failure percentages are as follows:

29559      184      0.006224838
30053      55      0.0018301
30388      21      0.000691062

That being said, your method does work and should give you the most accurate representation of the data.
0
 

Author Comment

by:Maliki Hassani
ID: 40020810
The formula I was using to get the percentage is (( failure/total) *12).
this worked because I was only reporting on the current monthly failure rate.  (told by management)

So now that they want to report on the Annualized failure rate, How should I write my formula?

Do I average the failure Percentage field?  
Formula:  averaged comes to:  0.035


Or

calculate (sum (failure total) / sum (total device)) *100
Formula:   90000   /      260  = 0.288888889
0
 
LVL 20

Accepted Solution

by:
Russ Suter earned 2000 total points
ID: 40020904
Realistically, report it any way you want.

Since they're asking you to make up data you can make up the answers as well.

More practically, I would average the failure percentage fields. At least it's easy to track that backwards and justify the value. If that's not what they want then they'll probably tell you.

Often people don't need what they are asking for. This is especially true of managers.
0
 

Author Closing Comment

by:Maliki Hassani
ID: 40021522
Thanks.. you are right about that..
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Freeze panes is an option within all variants of Excel to enable parts of a sheet to remain stationary when the cursor is in another part of the sheet. This is a very useful feature which is overlooked or under used.
This article describes how you can use Custom Document Properties to store settings and other information in your workbook so that they will be available the next time you open the workbook.
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question