OEE vs. OAE – Why OEE Doesn’t Tell the Full Story

Overall Equipment Effectiveness (OEE) has long been a go-to metric for measuring manufacturing performance. It tells you how effectively equipment performs during the time it is scheduled to run by looking at availability, performance, and quality.

But there’s an important question OEE doesn’t always answer:

Are we actually getting the most out of the assets we already have?

Imagine a machine is available for 24 hours but is only scheduled to run for 12. During those 12 scheduled hours, it performs extremely well and achieves an OEE of 90%.

On paper, that looks great. But OEE doesn’t account for the other 12 hours because they were never part of the planned production schedule.

That’s where Overall Asset Effectiveness (OAE) provides a broader view.

Instead of starting with scheduled production time, OAE considers the asset’s total available time. This makes the hours outside the production schedule part of the picture and helps reveal capacity that traditional OEE calculations may not show.

In our example, OEE tells us how effectively the machine performed during those 12 scheduled hours. OAE expands the view to the full 24 hours the asset was available. That creates an opportunity to ask why the remaining capacity wasn’t utilized.

Was there not enough demand? Were materials unavailable? Was staffing a constraint? Was maintenance planned? Or is there simply an opportunity to schedule more production?

That distinction matters because a plant can have a strong OEE and still have significant untapped capacity.

At Auredia, we’re focused on helping manufacturers see that bigger picture.

Auredia brings operational and asset data together to provide greater visibility into how equipment and capacity are actually being utilized. Rather than looking at a single performance metric in isolation, teams can begin connecting what happened on the plant floor with where time and capacity are being lost.

The goal isn’t to replace OEE. OEE remains valuable for understanding how efficiently equipment performs when it is scheduled to run.

OAE adds another layer to the conversation: Are we making the most of the asset’s total potential?

When manufacturers can see both sides of that story, they can make better decisions about scheduling, capacity, investments, and where to focus improvement efforts.

Your OEE might tell you that your equipment is performing well.

OAE might show you there’s still more opportunity hiding in the hours you aren’t measuring.

That’s the opportunity Auredia is helping manufacturers uncover.