Used and loved by millions
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
system duration
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "system duration" is correct and usable in written English.
It can be used when referring to the length of time a system operates or is expected to operate. Example: "The system duration for this project is estimated to be six months, after which we will evaluate its performance."
✓ Grammatically correct
Science
News & Media
Alternative expressions(3)
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
3 human-written examples
All TPE were performed with a centrifugal apheresis system (duration 130 minutes (IQR 115 – 147.5), plasma volume removed 5.1% body weight (IQR 4.6 – 5.5).
Science
None of the covariates included in our model [productivity of the study system, duration of the grazing treatment, nature of the study (experimental or descriptive) and the difference in grazing intensity studied] proved significant.
Science
'Poor' agreement was obtained for: number of garden watering sessions; hand held hose watering duration; fixed manual water system duration; hose and sprinkler watering duration (Table 2); washing machine hot water wash; washing machine low water level and washing machine medium water level.
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Wireless channel characteristics, specifically for mobile users, fluctuate due to channel fading, and thus it is required that channel feedback be delivered within one slot/frame (5 msec in WiMAX systems and 1.67 msec in cdma2000 EV-DO/HDR systems) duration [11].
OSPE and OSCE are performed at the end of each body system block (duration 5-6 weeks), longitudinal course (duration 7-15 weeks), and clinical clerkship.
Science
The amplitude of the AMD depends on the strength of the DPmi, the time of onset of the DPmi system, the duration of the DPmi, and the strength and duration of DL.
Science
To obtain a metric version of the Peircean system, a duration function has to be added.
Science
The system allocates duration TTWR to the bidirectional transmission, and then turns into idle status during T - TTWR.
An electric anode with high pulsed current and a negative electrode are adopted to form a lightning impulse system with duration time of 200 ms for simulation of the lightning stroke process.
Science
The leaders of the era were wrong about almost everything - the effectiveness of ultimatums, the value of the alliance system, the duration of the conflict, the tactics and strategy required in a new industrialized war, the social and cultural impact of mass death and the stability of empire.
News & Media
A validated adaptation of the neonatal facial coding system and duration of cry were used to assess pain.
Science
Expert writing Tips
Best practice
When describing experiments or projects, clearly state the "system duration" to provide a temporal context for your work.
Common error
Be careful not to confuse "system duration" with the overall lifespan of a system. "System duration" refers to the length of a specific operation or process, while lifespan indicates the total expected working life of the system.
Source & Trust
78%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "system duration" functions as a noun phrase, typically serving as a subject complement or object of a preposition. It specifies the length of time a system operates, is designed to operate, or is under consideration. Ludwig examples show its use in scientific studies, news reports, and technical specifications.
Frequent in
Science
70%
News & Media
15%
Wiki
15%
Less common in
Formal & Business
0%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "system duration" is a grammatically correct noun phrase, typically used to define the length of time a system operates. According to Ludwig, it's most commonly found in scientific and technical contexts, aiming to provide a clear temporal reference. While "system duration" is considered valid, alternative phrases like "system runtime" or "operational period" may suit different contexts. When using "system duration", ensure to distinguish it from the system's overall lifespan to maintain clarity.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
system operational time
Focuses on the active time a system is functioning.
duration of system operation
More verbose, emphasizing the activity of the system.
system runtime
Common term, particularly in computing.
system active period
Highlights the period when the system is in use.
operational lifespan of the system
Broader term including the entire expected period.
service life of the system
Related but it talks about how long a system can work/be functional.
system availability period
Focuses on the time the system is available for use, not necessarily in continuous operation.
period of system functionality
Emphasizes the time the system is capable of functioning.
system's period of activity
This is slightly different from the original query because it emphasizes a time of action rather than just existence.
system working time
Focuses specifically on when the system is in active use or working.
FAQs
How is "system duration" typically measured?
The measurement of "system duration" depends on the context. It can be measured in seconds, minutes, hours, days, weeks, months, or years, depending on the system and process being observed.
What are some alternatives to using the phrase "system duration"?
Depending on the specific context, you could use phrases like "system runtime", "operational period", or "service life of the system".
In technical writing, how important is it to specify the "system duration"?
Specifying the "system duration" is crucial in technical writing, as it provides essential information for understanding the scope and timeline of a process or experiment. Without this information, the results and implications may be misinterpreted.
What factors might affect the "system duration" in a scientific experiment?
Various factors can influence the "system duration" in an experiment, including the stability of the system, external environmental conditions, resource availability, and the specific parameters being tested.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
78%
Authority and reliability
4.1/5
Expert rating
Real-world application tested