![]() they may assess information relevant to the task in different ways.the programmers bring different prior experiences to the task.Design quality Ī system with two programmers possesses greater potential for the generation of more diverse solutions to problems for three reasons: Each of these intangible benefits, and many more, may be challenging to accurately measure but can contribute to more efficient working hours. One member might have knowledge of a topic or technique that the other does not, which might eliminate delays to find or testing a solution, or allow for a better solution, thus effectively expanding the skill set, knowledge, and experience of a programmer as compared to working alone. One member of the team might have more focus and help drive or awaken the other if they lose focus, and that role might periodically change. For example, the courtesy of rejecting phone calls or other distractions while working together, taking fewer breaks at agreed-upon intervals, or shared breaks to return phone calls (but returning to work quickly since someone is waiting). In addition to preventing mistakes as they are made, other intangible benefits may exist. Pair programming might theoretically offset these expenses by reducing defects in the programs. Along with code development time, other factors like field support costs and quality assurance also figure into the return on investment. However, the resulting code has fewer defects. Pair programming increases the person-hours required to deliver code compared to programmers working individually. This is intended to free the driver to focus all of their attention on the "tactical" aspects of completing the current task, using the observer as a safety net and guide. While reviewing, the observer also considers the "strategic" direction of the work, coming up with ideas for improvements and likely future problems to address. The two programmers switch roles frequently. One, the driver, writes code while the other, the observer or navigator, reviews each line of code as it is typed in. Pair programming is a software development technique in which two programmers work together at one workstation. ![]()
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