eXtremeProgramming (XP)

eXtremeProgramming (XP) is the most widely used agile process, originally proposed by Kent Beck.
 

 

XP Planning

• Begins with the creation of user stories.
• Agile team assesses each story and assigns a cost.
• Stories are grouped to for a deliverable increment.
• A commitment is made on delivery date.
• After the first increment project velocity(measure of how much work is getting done on your project)is used to help define subsequent delivery dates for other increments.

XP Design

• Follows the KIS principle [ Keep it Simple ].
• Encourage the use of CRC cards.
• For difficult design problems, suggests the creation of spike solutions—a design prototype.
• Encourages refactoring —an iterative refinement of the internal program design.

XP Coding

• Recommends the construction of a unit test for a story before coding commences.
• Encourages pair programming.

XP Testing

• All unit tests are executed daily.
• Acceptance tests are defined by the customer and executed to assess customer visible functionality