This significantly improves the design quality of the program as it reduces the chances of selecting a poor method. In doing so, they consider a larger number of ways of solving the problem than a single programmer alone might do. In an attempt to share goals and plans, the programmers must overtly negotiate a shared course of action when a conflict arises between them. they stand in different relationships to the problem by virtue of their functional roles.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 which the other does not, which might eliminate delays to find or test 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.
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Along with code development time, other factors like field support costs and quality assurance also figure in to 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.