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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
that is operating
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is operating" is correct and usable in written English.
It can be used to describe a system, machine, or process that is currently functioning or in use. Example: "The software that is operating on the server needs to be updated to the latest version."
✓ Grammatically correct
News & Media
Science
Academia
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Thus at any reactor that is operating, a lot of fuel will remain in the pool even if operators make maximum use of the casks.
News & Media
"Fundamentally, this is a plant that is operating safely".
News & Media
This cost is based on using a small system that is operating during the daylight only.
The process takes a full 12 hours in a reactor that is operating normally, Mr. Friedlander said.
News & Media
"Al Qaeda that is operating in Iraq is the same as that which is operating in Syria," he said.
News & Media
We are also currently trying to help a borrower that is operating two franchises and wants to open a third.
News & Media
"Everything in the concept has been built, is operating or has a close cousin that is operating," Dr. Martin said.
News & Media
The shop is the latest development in the Brixton pound project, the community currency that is operating over five years.
News & Media
BA is asking passengers: "Please do not come to the airport unless you have a confirmed booking on a flight that is operating".
News & Media
It has told passengers: Please do not come to the airport unless you have a confirmed booking on a flight that is operating.
News & Media
It is also prepared to create potential dangers to public safety as bunching occurs while people wait for the only up escalator that is operating.
News & Media
Expert writing Tips
Best practice
When describing complex systems or processes, use "that is operating" to clearly indicate the active component within a larger context. For instance: 'The module that is operating the machinery needs maintenance.'
Common error
Avoid using "that is operating" in simple sentences where a more direct verb would suffice. For example, instead of 'The machine that is operating is new', say 'The operating machine is new' or 'The machine in operation is new'.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is operating" primarily functions as a relative clause, modifying a noun by specifying its active state. Ludwig shows various examples in diverse contexts, affirming its role in providing additional, descriptive information about a noun.
Frequent in
News & Media
38%
Science
34%
Academia
14%
Less common in
Formal & Business
7%
Wiki
4%
Reference
3%
Ludwig's WRAP-UP
In summary, the phrase "that is operating" functions as a relative clause, specifying an entity currently in action. Ludwig confirms its frequent usage across news, science, and academic sources, suggesting a neutral to professional register. To ensure clarity and conciseness in writing, avoid overuse in simple sentences. Consider alternatives like "that is functioning" or adjusting the sentence structure to be more direct.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is functioning
Replaces 'operating' with 'functioning', emphasizing the action of performing or working.
that is running
Substitutes 'operating' with 'running', often used for systems or software in action.
that is working
Uses 'working' instead of 'operating', suggesting a focus on the current state of effectiveness.
that is in service
Replaces the phrase with a more formal expression indicating active use or availability.
that is live
Substitutes 'operating' with 'live', often used to describe broadcasts or systems currently available.
that is active
Replaces the phrase with a simpler adjective, indicating a state of being engaged or operational.
that is being utilized
Replaces 'operating' with a passive voice construction, emphasizing the action of use.
that is in effect
Changes the expression to highlight the presence and influence of something.
that is engaged
Uses 'engaged' to convey active participation or involvement.
that is underway
Shifts the focus to a process or activity currently in progress.
FAQs
How can I rephrase "that is operating" for brevity?
Consider using phrases like "that is functioning", "that is running", or simply "operating" as an adjective before the noun, depending on the context.
Is there a more formal alternative to "that is operating"?
Yes, in formal contexts, you might use "that is in service" or "that is active" to convey a similar meaning with a higher degree of formality.
When is it best to use "that is operating" over other similar phrases?
Use "that is operating" when you need to clearly identify a specific component or system that is actively performing its function, especially within a larger set of components or systems.
What's the difference between "that is operating" and "that is operational"?
"That is operational" describes something ready for use, while "that is operating" describes something actively being used. Something can be operational without currently operating.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested