Root Cause Analysis Flashcards
7 cards from real Lean Six Sigma Yellow Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Root Cause Analysis flashcards as text
In the context of RCA, what does 'gemba' refer to?
Answer: Going to the actual place where the work is done to observe directly
'Gemba' means 'the real place' in Japanese and refers to going to where work actually happens to gather firsthand observations.
A scatter diagram is used in root cause analysis primarily to:
Answer: Show the relationship or correlation between two variables
A scatter diagram plots two variables to reveal whether a correlation exists, which can help confirm or rule out potential causes.
Which of the following statements about the 5 Whys technique is TRUE?
Answer: The number 5 is a guideline; you stop when the root cause is reached
The number 5 is a rule of thumb; the actual number of 'Why' questions asked depends on the complexity of the problem.
A defect occurs only when a specific supplier's material is used. In a fishbone diagram, this most likely falls under which category?
Answer: Material
Supplier quality, raw materials, and components are classified under the 'Material' category in a fishbone diagram.
When performing RCA, data stratification helps by:
Answer: Breaking data into subgroups to identify patterns or hidden causes
Stratification splits data by factors like shift, machine, or operator to reveal subgroup patterns that point to specific causes.
What is the purpose of a 'corrective action' following root cause identification?
Answer: To permanently eliminate the root cause and prevent recurrence
A corrective action targets the root cause to permanently eliminate it and prevent the problem from happening again.
During an RCA workshop, a facilitator asks the team to generate as many potential causes as possible without evaluation. This technique is called:
Answer: Brainstorming
Brainstorming encourages open generation of ideas without judgment to ensure no potential cause is overlooked.