This usually involves some trial and error, which can take different amounts of time depending on the student, but it is no less valid a process if it takes longer. (nextgenlearning.org)
A valid process is one of the first things they should think about when they go about working out their own definition and description of «mission.» (christianitytoday.com)
«No matter what decisions are made, it's highly unlikely that everyone in the community will agree with them, but everyone should be able to agree that there was a valid process in reaching those decisions.» (wrfalp.com)