What models encourage pair programming to improve productivity

Wrong tasks: Pairing at the wrong time can be both time consuming and inefficient. One can slow down two: If one is a slow thinker/typer or unfocused it can slow down the other one as well. More talk less coding: You might end up explaining things that would be faster to just code. Two heads are better than one. If the driver encounters a hitch with the code, there will be two of them who'll solve the problem. More efficient. Fewer coding mistakes. An effective way to share knowledge. Develops your staff's interpersonal skills.

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