Why why Analysis is a tool to find out the root cause of a problem.
It's a very simple but effective method- asking Question.
This tool can be applied parallel with Brainstorming, Fish Bone Diagram.
Question to be asked 'why the problem is ?' to the team and The team will think the problem based on experience, historical data and give the answer.
Repeating Why to the answer, can be asked until reaching to the root cause.
Example:
Problem : Leakage in hydraulic pump.
Ask Why to above problem ...
Why1 :- Why there is leakage ?
Ans: Oil seal damage ...
Why2 :- Why oil seal damage ?
Ans :- problem in fitting
Why3:- Why problem in fitting ?
Ans : oil seal was of wrong size
Questioning can be continued until reach to potential causes of the problem.
Questioning to the problem, branches may be 1 or more than one as the answer may be 1 or more. One or more causes may be come as outcome by why why analysis ...
It's a very simple but effective method- asking Question.
This tool can be applied parallel with Brainstorming, Fish Bone Diagram.
Question to be asked 'why the problem is ?' to the team and The team will think the problem based on experience, historical data and give the answer.
Repeating Why to the answer, can be asked until reaching to the root cause.
Example:
Problem : Leakage in hydraulic pump.
Ask Why to above problem ...
Why1 :- Why there is leakage ?
Ans: Oil seal damage ...
Why2 :- Why oil seal damage ?
Ans :- problem in fitting
Why3:- Why problem in fitting ?
Ans : oil seal was of wrong size
Questioning can be continued until reach to potential causes of the problem.
Questioning to the problem, branches may be 1 or more than one as the answer may be 1 or more. One or more causes may be come as outcome by why why analysis ...
Also Read
5'S., Bench-marking., Calibration, CAPA., Fishbone Diagram, FMEA., Good Habits for Successful Engineers, Kaizen., Kanban., LEAN., MSA, OEE,