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Business & Workplace Languagephrase · /feɪl fæst/

fail fast

In simple English

Fail fast is a core principle in agile and lean development methodologies. Instead of trying to build the perfect product before launch, teams deliberately test features early, gather feedback immediately, and fix problems as they arise. This approach reduces the cost of fixing bugs and allows teams to pivot quickly if an idea is not working. In practice, this means releasing minimum viable products (MVPs), running experiments, and iterating based on real user feedback rather than theoretical assumptions. The philosophy recognizes that some problems cannot be predicted or prevented through planning alone. By failing early in the development cycle when costs are low, teams avoid the expensive situation of discovering major flaws after the product is fully built or already in production. This is especially valued in startups and fast-moving tech companies where speed and adaptability are competitive advantages. Fail fast does not mean abandoning quality or being careless. Rather, it means being strategic about when and where you test, accepting that some experiments will not work, and using those failures as learning opportunities. Teams that embrace fail fast typically have strong monitoring, logging, and rollback systems to minimize damage when something goes wrong.

Non-native speakers want to understand what fail fast means, why it matters in tech, and how to use it correctly in professional conversations.

At a glanceCEFR B2
Commonness5/5
Versatility4/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

✓We should fail fast and iterate based on user feedback.
✓Our fail-fast approach helped us identify the issue early.
✓Let us fail fast rather than spend months planning in a vacuum.

Real examples

in a standup

"We decided to fail fast with the payment integration, so we shipped it to 5% of users first."

in a code review

"This implementation is good enough to fail fast; we can optimize after we see how users interact with it."

in a team meeting

"Instead of debating for another two weeks, let us fail fast and launch the prototype to gather real data."

Don't say this

Handle with care. Do not use 'fail fast' to mean literal speed of failure. It refers to a philosophy of discovering problems early through rapid iteration, not rushing recklessly.

✕We need to fail fast this project.
✓We need to adopt a fail-fast approach for this project.— Fail fast is a philosophy or approach, not an action verb. You do not fail fast something; you take a fail-fast approach.
✕Failing fast means our code is bad.
✓Failing fast means we test quickly to find problems early.— Fail fast is not about poor quality code; it is about discovering issues rapidly to improve quality through iteration.
✕We failed fast because we shipped without testing.
✓We adopted a fail-fast strategy, which means we tested the MVP with real users quickly.— Fail fast includes structured testing and monitoring, not reckless shipping without any checks.

Other forms

noun

fail fast

"Fail fast is a core principle of our development process."

adjective

fail-fast

"Our fail-fast approach allows us to iterate rapidly."

verb

to fail fast

"We want to fail fast with this experiment before investing more resources."

Often used with

fail-fast approachThe most common collocation; describes the overall methodology
fail-fast cultureUsed to describe a company or team that embraces rapid experimentation
fail-fast mindsetDescribes the psychological attitude of accepting early failures
embrace fail fastMeans to adopt or support the fail-fast philosophy
fail fast and iterateA common pairing emphasizing the cycle of testing, failing, and improving

Similar words

rapid iterationSimilar concept but emphasizes the cyclical improvement process rather than the philosophy of early failure
agile developmentA broader methodology that includes fail fast as one of its principles
test early, test oftenDescribes the testing aspect of fail fast but does not capture the full philosophy
lean startupA business methodology that heavily emphasizes fail fast principles

Opposites

waterfall developmentbig bang releaseextensive upfront planning

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your manager wants to release a new feature quickly to test the market. What do you say?

Complete the sentence

2. Our startup culture emphasizes a _______ mindset, which helps us adapt quickly.

Spot the mistake

3. Which sentence uses fail fast correctly?

Rewrite naturally

4. Rewrite this sentence using fail fast: 'We want to test this idea with users quickly instead of planning everything first.'

Questions

Quick poll

Have you said "fail fast" in a standup this week?

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