While these practices can be performed

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Extreme practices
General characteristics of practices where XP is suitable are described by Don Wells:

Dynamically changing software requirements
Risks caused by fixed-time projects using new technologies
Expanded development team
The technology you use enables you to automate unit and functional testing.
The XP core is an interrelated set of software development practices listed below. in isolation, many teams have found that some practices reinforce others and should be used together to fully address the risks you often encounter in software development:

Pair programming is one of the useful XP practices
Pair programming means that all production software is developed by two people sitting at the same machine. The idea behind this practice is that two brains and four eyes are better than one brain and two eyes. You france email list effectively get continuous code review and faster response to vexing problems that might leave one person stumped.

Agile: a software development methodology

Teams that use pair programming have found that it improves quality and doesn't take twice as long because they are able to solve complex situations faster and are more focused on the task at hand, thereby creating less code to accomplish the same task.

Extreme doesn't mean bad
Extreme programming ensures effective interaction of all employees, resulting in their exchange of experience and stable growth in terms of professional skills and high productivity.