Regarding the lack of breadth of a 5 whys analysis, there is a fishbone diagram that can be used before the 5 whys to ensure more breadth. In manufacturing the

Regarding the lack of breadth of a 5 whys analysis, there is a fishbone diagram that can be used before the 5 whys to ensure more breadth. In manufacturing there is usually 4 big topics (person, machine, material, method), but there are many variations that can be used. Trees or other visual depictions can be used too. The point is to have some sort of structure and adapt it to your needs.