The root cause definition requires that it can be turned on or off, at will.
Activities in D4 include: D5: Permanent Corrective Action (PCA) The PCA is directed toward the root cause and removes / changes the conditions of the product or process that was responsible for the problem.
It is a problem solving method that drives systemic change, improving an entire process in order to avoid not only the problem at hand but also other issues that may stem from a systemic failure.
8D has grown to be one of the most popular problem solving methodologies used for Manufacturing, Assembly and Services around the globe.
Activities in D8 include: The 8D process has Root Cause Analysis (RCA) imbedded within it.
All problem solving techniques include RCA within their structure.
The 8D process alternates inductive and deductive problem solving tools to relentlessly move forward toward a solution.
The Quality-One approach uses a core team of three individuals for inductive activities with data driven tools and then a larger Subject Matter Expert (SME) group for the deductive activities through brainstorming, data-gathering and experimentation.
8D must always have two key members: a Leader and a Champion / Sponsor: D2: Describe the Problem The 8D method’s initial focus is to properly describe the problem utilizing the known data and placing it into specific categories for future comparisons.
The “Is” data supports the facts whereas the “Is Not” data does not.