Many organizations today are interested in being proactive by discovering and eliminating problems before they occur. The Apollo Root Cause Analysis methodology cannot predict the future for you, and you should be very wary of anyone who claims that they can. However, an investigation using a structured root cause analysis method will allow for the discovery of the "systemic" causes that are at work for not only the problem at hand that is being reactively analyzed, but also problems that have yet to occur.
If the specific "systemic" cause can be eliminated as a result of the reactive analysis, in essence, this is a proactive step because all future problems that would result from this same "systemic" cause will not occur. These systemic causes typically reside in the organizational culture, work processes, and procedures, as a few examples.