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Bino Punnoose ASQ CSSBB
Problem statement
WHY:
WHY:
WHY:
WHY:
WHY:
Ask “Why” 5
times to get
to the root
cause
If you stop
with 1 or 2
Why’s, only
the symptom
will be
addressed
1
Jack came home with a
bruise on his knee
WHY: Jack fell off
his bike
WHY: Jack was
not careful while
riding his bike
Ask “Why” 5
times to get
to the root
cause
Corrective
action:
Jack needs to
be more
careful
Is the problem
solved?
2
Bino Punnoose ASQ CSSBB
Jack came home with a bruise on
his knee
WHY: Jack fell off his
bike
WHY: He was turning
a corner too fast
WHY: He was not able
to brake soon enough
WHY: The brakes did
not work properly
WHY: The brake pads
had come loose
Ask “Why” 5
times to get
to the root
cause
Corrective
action:
Adjust the
brake pads
Is the problem
solved?
3
Bino Punnoose ASQ CSSBB
ROOT CAUSE: The brake pads had come
loose
THEREFORE: The brakes did
not work properly
THEREFORE: He was not able
to brake soon enough
THEREFORE: He was turning
a corner too fast
THEREFORE: Jack fell off his
bike
THEREFORE: Jack came home
with a bruise on his knee
Reverse the
sequence and
replace “why”
with
“therefore”.
The
statements
should “flow”
logically.
4
Bino Punnoose ASQ CSSBB

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5 Why Problem solving Simplified!

  • 1. Bino Punnoose ASQ CSSBB Problem statement WHY: WHY: WHY: WHY: WHY: Ask “Why” 5 times to get to the root cause If you stop with 1 or 2 Why’s, only the symptom will be addressed 1
  • 2. Jack came home with a bruise on his knee WHY: Jack fell off his bike WHY: Jack was not careful while riding his bike Ask “Why” 5 times to get to the root cause Corrective action: Jack needs to be more careful Is the problem solved? 2 Bino Punnoose ASQ CSSBB
  • 3. Jack came home with a bruise on his knee WHY: Jack fell off his bike WHY: He was turning a corner too fast WHY: He was not able to brake soon enough WHY: The brakes did not work properly WHY: The brake pads had come loose Ask “Why” 5 times to get to the root cause Corrective action: Adjust the brake pads Is the problem solved? 3 Bino Punnoose ASQ CSSBB
  • 4. ROOT CAUSE: The brake pads had come loose THEREFORE: The brakes did not work properly THEREFORE: He was not able to brake soon enough THEREFORE: He was turning a corner too fast THEREFORE: Jack fell off his bike THEREFORE: Jack came home with a bruise on his knee Reverse the sequence and replace “why” with “therefore”. The statements should “flow” logically. 4 Bino Punnoose ASQ CSSBB