
e Scientic Method and Root Cause Analysis • 13
Act
Take actions based on the
results of the test by either
performing conrmation
testing or rejecting the
hypothesis and moving to
the next iterative of the
PDCA cycle.
Observe the results of the
previous PDCA cycle.
Test the hypothesis or make
observations.
Compare the observations to
the results the hypothesis
predicted.
Use induction to form a
tentative hypothesis and
extrapolate beyond the data.
Check
Plan
Do
FIGURE 1.6
e second PDCA cycle.
Act
Take actions based on the
results of the test by either
performing conrmation
testing or rejecting the
hypothesis and moving to
the next iterative of the
PDCA cycle.
Observe the ...