Parkinson's law of triviality, also known as bikeshedding, bike-shed effect, or the bicycle-shed example, is C. Northcote Parkinson's 1957 argument that organisations give disproportionate weight to trivial issues. Parkinson observed and illustrated that a committee whose job was to approve plans for a nuclear power plant spent the majority of its time with pointless discussions on relatively trivial and unimportant but easy-to-grasp issues, such as what materials to use for the staff bike-shed, while neglecting the less-trivial proposed design of the nuclear power plant itself, which is far more important but also a far more difficult and complex task to criticise constructively.
The law has been applied to software development[2] and other activities, and the term "bikeshedding" was coined as a metaphor to illuminate Parkinson's Law of Triviality and was popularised in the Berkeley Software Distribution community by Poul-Henning Kamp[3] and has spread from there to the software industry at large.
-- Source Wikipedia.