Say it like this
- We experienced 2 hours of downtime last night
- We need to schedule downtime for server maintenance
- Minimize downtime by using redundant systems
Use it at work
Planning
- The migration needs 10 minutes of downtime.
- Let's schedule downtime on Sunday night.
Talking to customers
- We'll have planned downtime Saturday from 2 to 3 a.m. UTC.
- Sorry for the downtime earlier today.
Reviewing
- We had 40 minutes of downtime this month.
- Can we do this without downtime?
Don't say this
Downtime is a noun, not a verb. You do not 'downtime' something; you 'schedule downtime' or 'experience downtime'.
Don't mix it up
| Term | What it is | Who writes or uses it | When |
|---|---|---|---|
| downtime | Time a system is unavailable | Ops, customers | Outages or maintenance |
| outage | Unplanned downtime | Ops | Something broke |
| uptime | Time a system is available | Ops | SLA reports |
Practice
Try it
4 quick exercises
1. Your database server will be offline for maintenance tomorrow. How do you announce this?
2. Our SLA guarantees 99.9% _______, which means less than 1 hour of _______ per month.
3. Which sentence uses downtime incorrectly?
4. Rewrite this in natural tech English: 'The website is not working right now because we are doing repairs.'
Say it out loud
Phrase 1 of 3
"We experienced 2 hours of downtime last night"
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More about downtime
Real examples(3)
- in a standup
"We had 30 minutes of downtime on the API yesterday due to a database connection issue."
- in a postmortem meeting
"The root cause analysis shows that downtime could have been prevented with better monitoring."
- in a status page notification
"We will perform scheduled downtime on the user dashboard from 2 AM to 4 AM EST on Saturday."
More mistakes(2)
Handle with care. Do not use downtime as a verb (saying 'to downtime something' is incorrect). Downtime is a noun describing a period of non-operation. Also avoid confusing it with 'break time' or personal rest periods.
- ✕The customer took some downtime this afternoon.✓The customer experienced downtime this afternoon.
Downtime is not something someone 'takes'—it is something that happens to a system. Use 'experience' or 'suffer' instead.
- ✕We had downtime because the team needed a break.✓The team took a break while we handled scheduled downtime.
Downtime refers to system unavailability, not employee rest periods. Do not confuse it with break time.
Other forms(3)
- downtime noun (countable/uncountable)
"We aim to keep downtime under 1% annually."
- downtime window noun (in compounds)
"The maintenance downtime window is scheduled for next Friday."
- downtime period noun (in compounds)
"During the downtime period, the API will not respond to requests."
Often used with(6)
- scheduled downtime · Planned maintenance or updates; used when downtime is expected and announced in advance
- unscheduled downtime · Unexpected system failure; used when downtime occurs without warning
- minimize downtime · To reduce the duration or frequency of service interruptions
- experience downtime · To have a system go down; the most common collocation with downtime as the object
- downtime window · The specific time period during which downtime will occur
- zero downtime · A goal meaning no service interruption (zero downtime deployment)
Similar words(3)
- outage · More dramatic and usually implies unexpected failure; downtime can be scheduled
- service interruption · More formal and broader term; downtime is more specific to tech infrastructure
- unavailability · More technical term that emphasizes the lack of access; downtime includes the time aspect
Opposites(3)
- uptime
- availability
- operational
Questions(5)
- What does downtime mean in software engineering?
- Downtime is a period when a system, server, application, or service is not available or not working properly. It can be scheduled (planned maintenance) or unscheduled (unexpected failure). For example, if your website goes offline for 2 hours, that is 2 hours of downtime.
- How do you use downtime in a sentence at work?
- You typically use downtime with verbs like 'experience,' 'schedule,' 'minimize,' or 'reduce.' For example: 'We experienced 15 minutes of downtime yesterday,' 'We scheduled downtime for tomorrow morning,' or 'We aim to reduce downtime through better monitoring.'
- Is downtime formal or informal?
- Downtime is neutral in formality. It is professional and widely used in technical documents, emails, meetings, and incident reports. You can use it in both casual team conversations and formal business communication.
- What is the difference between downtime and uptime?
- Downtime is when a system is unavailable, while uptime is when it is running normally. If a server has 99% uptime, it has 1% downtime. Companies track both metrics to measure reliability.
- Can downtime be used as a verb?
- No, downtime is only a noun. You cannot say 'to downtime something.' Instead, say 'to schedule downtime' or 'to minimize downtime.' This is a common mistake for non-native speakers.
