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INVEST Criteria In Agile

This article explains the INVEST criteria in Agile.

Purpose

The INVEST criteria help identify which features, user stories, or tasks deliver the highest value and should be prioritized in the product backlog.

What Does INVEST Mean?

INVEST stands for Independent, Negotiable, Valuable, Estimable, Small, and Testable.

Independent

Each user story should be as independent as possible. This simplifies prioritization and reduces dependencies that may delay development. If a story cannot function independently, it may need to be broken down into smaller stories.

Negotiable

Stories should remain flexible and avoid excessive upfront detail. Requirements can be refined during planning or grooming sessions, enabling collaboration and adjustments without changing the core objective.

Valuable

A user story should deliver value to either end users or stakeholders, whether directly through user-facing functionality or indirectly through supporting improvements such as infrastructure or system enhancements.

Estimable

Stories should be sufficiently clear and detailed to allow effort estimation, whether in story points, hours, or another metric. If a story is too vague or too large to estimate accurately, it may require further refinement or decomposition.

Small

Small, well-defined stories promote rapid feedback and continuous delivery, aligning with Agile’s iterative nature. They are easier to estimate, implement, and test, reducing risk while enabling incremental value delivery.

Testable

Each user story should include clear, testable acceptance criteria so its requirements can be objectively validated. This ensures quality checks can confirm whether the story meets the Definition of Done, while acceptance tests clearly define what success looks like for the story.

Example

Consider the following user story: -

As a registered user
I want to receive a notification when my subscription is about to expire
so that I can renew it on time.

INVEST Criteria	Does User Story Falls Under INVEST Criteria
Independent	This story can be implemented independently without relying on other features.
Negotiable	The notification details (email vs. in-app notification) can be discussed.
Valuable	It helps users efficiently manage their subscriptions.
Estimable	The team can estimate the effort required.
Small	This is a well-defined function that is achievable within one sprint.
Testable	Acceptance criteria should confirm that notifications are sent within the configured time window before expiration.

Posted By -	Karan Gupta

Posted On -	Wednesday, November 13, 2024

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