12. 5Whys - Unbreakable Rules
1 point possible (graded)
Q12- Which of the following is NOT an unbreakable rule of the
5Why analysis?
A- Data and Facts only
B- Collect as many whys as possible, even if they have
meaningless answers
C- Clear and Agreed Problem Statement
D- Direct Interrelation Chain between each Why
E- Correct Team Composition
13. - 15. 5Whys - CPU Utilization
3 points possible (graded)
Q13- You are given the following 5Why analysis:
1. Why is the website down? The CPU (Central Processing Unit)
utilization spiked to over 100% on all servers.
2. Why is the CPU utilization that high? A new part of code
contains an infinite loop.
3. Why was this piece of code written? Employee A made a
mistake.
4. Why did her mistake get submitted? A didn’t write a test
run for the feature.
5. Why did she not write a test run? She is a new employee and
was not properly trained.
6. Why was she not properly trained? No training procedure for
new employees established.
What is the problem statement to this 5Why analysis?
A- No training procedure for new employees established.
B- The CPU utilization is over 100% on all servers.
C- The website is down.
D- Employee A reported that the CPU utilization might spike to
over 100% on all servers.
What is the occurrence root cause (ORC)?
A- Employee A didn’t write a test run for the feature.
B- The website is down.
C- No training procedure for new employees established.
D- The CPU utilization is over 100% on all servers.
What is the systemic root cause (SRC)?
A- Employee A didn’t write a test run for the feature.
B- No training procedure for new employees established.
C- The website was down.
D- The CPU utilization is over 100% on all servers.
16. - 18. 5Whys - Buying a New Table
3 points possible (graded)
Your company produces wooden table and chairs. The legs for
tables and chairs are cut on the same machine. The pieces of
furniture are sold in parts and the customers have to assemble the
parts themselves. One day, a customer complains that the height of
the table he bought and assembled is about 30cm lower than declared
in the product description.
You conduct a 5Why analysis:
1. Why is the height of the table too low? The legs are too
short.
2. Why are the legs too short? They were cut too short.
3. Why were they cut too short? The cutting-machine had the
wrong settings.
4. Why were the settings wrong? They were still adjusted to
cutting legs for chairs.
5. Why were they still adjusted to that? The operator didn’t
change them before the production line switched to
table-legs.
6. Why did he not change them in time? He had an outdated
production schedule.
7. Why did he have an outdated schedule? The weekly update
wasn’t performed as planned.
Please answer the following questions:
What is the problem statement to this 5Why analysis?
A- The height of the table is too low.
B- The legs of the table are too short.
C- The customer complained.
What is the systemic root cause (SRC)?
A- The weekly update wasn’t performed as planned.
B- The legs were cut too short.
C- The operator didn’t change the specifications before the
line switched to table-legs.
What is the occurrence root cause (ORC)?
A- The legs were cut too short.
B- The operator didn’t change the specifications before the
line switched to table-legs.
C- The operator had an outdated production schedule.