×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

# OEE - HOURLY CALCULATION

## OEE - HOURLY CALCULATION

(OP)
As we all know OEE is a multiplication of Availability, Performance and Quality.
There is some debate here on what formula it should be used to calculate OEE every hour. We are a one piece flow environment having the automotive industry as a customer.
Here are some of the formulas that our corporate office came up with:

OPTION 1:
The OEE by hour calculation should be:
The total number of good parts produced for that hour/the goal
of parts for that hour.
The goal is calculated using the available time we are running
during the hour/the Takt time.

OPTION 2:
The hourly OEE calc is:
Total assemblies produced - Rejects /Standard machine capability
for one hour

Also during a visit at the plant near our corporate office I saw OEE majority over 100% and I was very surprised knowing that 85% is considered "World Class"

What are your thoughts on this metters?

Best regards,

Rabdatorul

### RE: OEE - HOURLY CALCULATION

Interesting.

Option 1 seems like it could be well over 100% depending on factors in the equation. When ever I see "goal" as part of a metric I get worried.
The "goal" of parts per hour varies? That just doesn't seem right.

I would say Option 2

what can you produce, how much is good, and how much could you produce if everything was "reasonably" perfect

my machine is capable of putting out 100 parts an hour
I make 98 but 1 is bad. I am at 97%

StrykerTECH Engineering Staff
Milwaukee, WI
http://www.stryker-tech.com/

### RE: OEE - HOURLY CALCULATION

Option 1 seems closer to the classic calculation.

Option 2 seems like it has the potential to hide issues with rejects by cranking out numbers.

I would stick to the classic calculation of OEE and give visibility to all three areas of importance

Quality % - Rejects
Availabity % - Machine/Production Uptime
Throughput % - Machine/Production Stability

I've seen 100% plus OEE at some manufacturing facilities.  This could be a symptom of not setting appropriate standards to measure production.

Rich.....

Richard Nornhold, PE
http://www.personna.com

#### 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.

#### Resources

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
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!