Root cause analysis can be used to identify the underlying causes of why an incident occurred so that the most effective solutions can be identified and implemented.
Problem solving and root cause analysis involve three questions.
What's the problem? Why did it happen? What will be done to prevent it?
Problem – hot wax build up on mitter material.
Why did it happen? In other words, what are potential causes of build up on mitter material?
Experience shows such build up can be caused by reclaim water that is too dirty, improper concentration of wax, hydraulic oil leak, insufficient cleaning as in maintenance (routine cleaning and deep cleaning of tunnel), etc.
Once the root cause is identified, then the corrective action can be taken to prevent it.