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Planning & Processnoun · /pruːf əv ˈkɒnsept/

proof of concept

In simple English

A proof of concept, often abbreviated as PoC, is a critical phase in tech development where engineers build a minimal version of a feature or product to validate that the core idea is technically feasible. Rather than spending months developing a complete product, teams create a PoC to answer fundamental questions: Does the technology work? Is the approach viable? Are there unexpected technical obstacles? This saves money and prevents wasted effort on ideas that will not work in practice. In real workplaces, you will hear proof of concept discussed during planning meetings, sprint planning, and when teams need to de-risk new initiatives. A PoC is typically smaller and simpler than a minimum viable product (MVP). For example, a team might build a proof of concept for a machine learning feature by testing the algorithm on a small dataset, without building the full user interface or production infrastructure. Once the PoC succeeds, the team decides whether to invest in a full product. Proof of concept is especially common when exploring new technologies, third-party integrations, or architectural changes where the technical risk is high. It demonstrates that something works before committing major resources.

Understanding what a proof of concept is and why teams build them before full development.

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 need to build a proof of concept first
✓Let us run a quick PoC to validate this
✓The proof of concept showed the idea was viable

Real examples

in a standup

"We are building a proof of concept for the real-time notification system this sprint to see if our approach scales."

in a code review

"This proof of concept demonstrates that the API can handle the expected load, so we can move forward with the full implementation."

in a team meeting

"The proof of concept for blockchain integration revealed some unexpected latency issues, so we need to explore alternative solutions."

Don't say this

Handle with care. Do not use as a verb (saying you want to proof of concept something). It is a noun. Say build, create, or test a proof of concept instead.

✕We need to proof of concept this idea quickly.
✓We need to build a proof of concept for this idea quickly.— Proof of concept is a noun, not a verb. Use build, create, or develop with it.
✕The proof of concept already includes all user features.
✓The proof of concept validates the core technical approach. The full version will include all features.— A PoC is minimal and focused on answering one key technical question, not implementing everything.
✕Our proof of concept is now in production.
✓Our proof of concept succeeded, so we are building the production version.— A PoC is temporary and exploratory. Once successful, you build the full product separately.

Other forms

noun (singular)

proof of concept

"The proof of concept for the payment gateway took two weeks."

noun (plural)

proofs of concept

"We completed three proofs of concept before choosing the best architecture."

abbreviation

PoC

"We shortened the timeline by running a PoC in parallel with other work."

Often used with

build a proof of conceptMost common action; to create and test the concept
proof of concept phaseThe stage or period when a PoC is being executed
proof of concept succeeds or failsThe outcome that determines whether the approach is viable
quick proof of conceptA short, fast PoC to quickly validate an idea
proof of concept stageThe development phase before full implementation

Similar words

prototypeSimilar but prototype often emphasizes user experience, while PoC emphasizes technical feasibility
pilot projectBroader term; a pilot may include more features and sometimes real users, while a PoC is more focused and minimal
spikeAgile term for a short investigation; narrower in scope than a full PoC

Opposites

full production releasecomplete implementation

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your team wants to test if a new technology will work. How do you say it?

Complete the sentence

2. Before we invest in the new payment system, let us create a _______ to validate the integration.

Spot the mistake

3. Which sentence uses proof of concept incorrectly?

Rewrite naturally

4. Rewrite using proof of concept: We need to test if this idea will actually work before we spend a lot of money building it.

Questions

Quick poll

Have you said "proof of concept" in a standup this week?

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