A "best practice"

is a method or procedure for performing a specific task or activity at the lowest feasible cost.

refers to performing activities in a manner that is superior to established industry standards.

refers to performing a value chain activity in a manner that results in $10$ or fewer defects or errors per million iterations.

$$ refers to performing a value chain activity in a manner that aids the development of a core competence.

is a method or technique employed by at least one enterprise and shown to be unusually effective in lowering costs, improving quality or performance, shortening time requirements, enhancing safety, or achieving one or more other highly positive operating$$outcomes$.$