What does severity mean in software engineering?

Severity is a classification level that describes how serious or critical a bug, issue, or problem is. It indicates the degree of impact on system functionality and users. Common severity levels are Critical, High, Medium, and Low.

How is severity different from priority?

Severity measures the seriousness or impact of an issue (how bad it is), while priority measures when it should be fixed relative to other work. An issue can have high severity but low priority (we know it is serious but we will fix it later), or low severity but high priority (it is not critical but we want to fix it soon).

What are typical severity levels?

Most tech companies use four severity levels: Critical (system is down or core functionality is broken), High (significant functionality is impaired), Medium (minor functionality is affected), and Low (cosmetic issues or workarounds exist).

How do you use severity in a sentence at work?

Use it as a noun: The severity of this bug is High and it needs to be fixed before release. Or: What severity level should we assign to this issue? Never use it as a verb (do not say to severity something).

Is severity formal or informal?

Severity is neutral and professional. It is standard terminology in all tech companies and is equally appropriate in standups, emails, documentation, and formal incident reports.

severity meaning in tech — Speak Tech English

Commonness	5/5
Versatility	5/5
Formality	CasualFormalNeutral
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticDirect
Region	US and UK

Say it like this

✓What is the severity of this issue?

✓We need to address the high severity bugs first.

✓This ticket has critical severity.

Real examples

in a standup

"The authentication bug we found yesterday has Critical severity, so we are halting all other work to fix it."

in a code review

"This memory leak could impact production, so I would rate its severity as High."

in a team meeting

"We have three Medium severity items and one Low severity item remaining in the sprint."

Don't say this

Handle with care. Severity is a noun describing the degree of seriousness, not a verb. Do not use it as 'to severity' or confuse it with 'serious' (adjective).

✕We need to severity this bug immediately.

✓We need to address the severity of this bug immediately.— Severity is a noun, not a verb. You cannot 'severity' something.

✕The severity is very serious.

✓The severity is Critical or The issue is very serious.— Severity already indicates seriousness, so using 'serious' together is redundant.

✕This bug has low priority but high severity.

✓This bug has low priority but high severity. (This is actually correct)— This is a valid and common statement. Priority and severity are different dimensions.

Other forms

noun

severity

"The severity of the outage requires immediate action."

noun (plural)

severities

"Different severities require different response times."

Often used with

severity levelThe classified rank of a problem, as in Critical, High, Medium, or Low severity level.

high severityUsed to describe urgent, impactful problems that need prompt attention.

critical severityUsed for the most serious issues that block core functionality or affect production.

assign severityThe act of categorizing or ranking a problem when it is first reported.

severity ratingA numerical or categorical score indicating the seriousness of an issue.

Similar words

impactImpact describes the consequence of a bug, while severity describes how serious it is.

criticalityCriticality and severity are very similar; both describe how serious an issue is.

seriousnessSeriousness is more general and informal; severity is the technical term used in ticketing systems.

Opposites

trivialityinsignificance

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Practice

Try it

4 quick exercises

Complete the sentence

1. We assigned _______ to the authentication bug because it prevents all users from logging in.

Spot the mistake

2. Which sentence uses 'severity' incorrectly?

We must severity this bug before Friday.The severity of the issue is Critical.This item has Medium severity.What severity level should we assign to this?

Pick the most natural phrasing

3. Your team finds a major bug in production. How do you say it?

This bug is very severity.This bug has Critical severity.The severity of this is serious.This is a severity bug.

Rewrite naturally

4. Rewrite this using 'severity': 'This problem is really bad and we need to fix it today.'

Questions

Quick poll

Have you said "severity" in a standup this week?

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