Pair Programming as Informal Code Review

Pair programming is a less formal process that probably doesn't find as many errors as formal code inspections, but it is a much cheaper inspection process that does not introduce delays into the development process

Explanation

Code inspections and reviews are very successful in discovering a high percentage of software errors, but are time-consuming to organise and typically introduce delays into development. Pair programming is a less formal process that probably doesn't find as many errors as code inspections, but it is a much cheaper inspection process that does not introduce delays.