5 Whys is great for getting depth into one causal subtree, but based on a paper I once read, answers can lack breadth when there is more than one cause (which is often the case). It said that "Why" is often best answered with a directed acyclic graph of causal relationships.
(Though when I tried to use a causal DAG for root cause analysis of an incident at my current company, I was told that I was wasting time and no one cares. But I thought the data I found was pretty interesting and worth exploring.)
(Though when I tried to use a causal DAG for root cause analysis of an incident at my current company, I was told that I was wasting time and no one cares. But I thought the data I found was pretty interesting and worth exploring.)