First set the stage as to why you’re asking why. Be sure to let people know the purpose: to work the causal chain. Otherwise, people may feel like you are interrogating them. We sometimes get too caught up in applying a tool rather than how we’re applying it or how it makes people feel which is just as, if not more important. Leading to root cause is important, but sometimes we meander there, as opposed to taking a direct straight line route! Especially if this is people’s first time. Let people brainstorm possible root causes, then, select one or a few possible root causes that may lead to working back the causal chain versus solving world hunger or boiling the ocean.