RCA RCA Problem Definition 2 — Questions and Answers
Question 1: What is the purpose of 'scoping' an RCA investigation?
- To delay the investigation until all data is available
- To set boundaries on what will and will not be investigated (Correct answer)
- To select which team members are responsible for failures
- To estimate the cost of corrective actions
Correct answer: To set boundaries on what will and will not be investigated
Scoping defines the boundaries of an RCA investigation so that resources are focused on the relevant problem area rather than spreading too broadly.
Question 2: In RCA, what distinguishes a 'symptom' from a 'root cause'?
- A symptom is the desired outcome; a root cause is the actual outcome
- A symptom is a visible effect of the problem; a root cause is the fundamental reason it occurred (Correct answer)
- A symptom can be corrected; a root cause cannot
- A symptom occurs rarely; a root cause occurs frequently
Correct answer: A symptom is a visible effect of the problem; a root cause is the fundamental reason it occurred
Symptoms are observable signs that something is wrong, while root causes are the underlying fundamental reasons that, if eliminated, would prevent recurrence.
Question 3: Which question format best helps teams avoid treating symptoms as root causes during problem definition?
- How much did this problem cost?
- Who was responsible for the failure?
- What would have to be true for this problem NOT to occur? (Correct answer)
- When did the failure happen?
Correct answer: What would have to be true for this problem NOT to occur?
Asking what conditions would prevent the problem prompts teams to think about underlying causes rather than surface-level symptoms.
Question 4: What is the role of 'baseline data' when defining an RCA problem?
- To set the salary benchmark for RCA investigators
- To establish what normal performance looks like so deviations can be measured (Correct answer)
- To document all corrective actions ever taken
- To provide a list of approved vendors
Correct answer: To establish what normal performance looks like so deviations can be measured
Baseline data defines normal or expected performance, enabling investigators to quantify the gap between expected and actual performance.
Question 5: In RCA, why should a problem statement avoid words like 'probably' or 'apparently'?
- They make the statement too long
- They introduce assumptions and bias before evidence is gathered (Correct answer)
- They are grammatically incorrect in formal reports
- They offend team members who are named in the statement
Correct answer: They introduce assumptions and bias before evidence is gathered
Words like 'probably' pre-assume a cause before investigation begins, which can bias the team and cause them to overlook alternative causes.
Question 6: What does the 'Is Not' column in an Is/Is Not problem definition help investigators understand?
- Which corrective actions have already been tried
- What conditions, locations, or timeframes were NOT affected, to narrow the cause (Correct answer)
- Which employees were not on duty during the incident
- Which machines were not inspected
Correct answer: What conditions, locations, or timeframes were NOT affected, to narrow the cause
The 'Is Not' column highlights contrasts to help investigators identify what unique factor or change is present in the 'Is' scenario but absent in the 'Is Not' scenario.
RCA RCA Problem Definition 2
What is the purpose of 'scoping' an RCA investigation?