Agile Glossary

The Three C’s

What is The Three C’s?

“Card, Conversation, Confirmation”; this formula (from Ron Jeffries) captures the components of a User Story:

  • a “Card” (or often a Post-It note), a physical token giving tangible and durable form to what would otherwise only be an abstraction:
  • a “conversation” taking place at a different time and places during a project between the various people concerned by a given feature of a software product: customers, users, developers, testers; this conversation is largely verbal but most often supplemented by documentation;
  • the “confirmation”, finally, the more formal the better, that the objectives the conversation revolved around have been reached.

Origins

  • 2001: the Card, Conversation, Confirmation model is proposed by Ron Jeffries to distinguish “social” user stories from “documentary” requirements practices such as use cases

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Additional Agile Glossary Terms

A Niko-niko Calendar is updated daily with each team member's mood for that day. Over time the calendar reveals patterns of change in the moods of the team, or of individual members.
A high-level summary of the project's key success factors displayed on one wall of the team room as a flipchart-sized sheet of paper.
The team meets regularly to reflect on the most significant events that occurred since the previous such meeting, and identify opportunities for improvement.
"Integration" (or "integrating") refers to any efforts still required for a project team to deliver a product suitable for release as a functional whole.
Class Responsibility Collaborator (CRC) Cards are an object oriented design technique teams can use to discuss what a class should know and do and what other classes it interacts with.
An iteration is a timebox during which development takes place. The duration may vary from project to project and is usually fixed.
Velocity is the total effort estimates associated with user stories that were completed during an iteration.

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