Often the actual hurdle in the method is not the experimental design, but the selection of the right factors. In this compilation, some goal-oriented methods are mentioned to bring you a little closer to your goal.

1. By info@stefan-moser.com
How do I determine the right
factors for a DoE?

2. By info@stefan-moser.com
First, it is useful to set
boundaries for the study of the
process.
The "Boundary Diagram" supports this.
Sub Process Sub Process
Sub Process
Sub Process
Sub Process
Sub Process
Sub Process
Sub Process
Sub Process
Sub Process
Scope

3. By info@stefan-moser.com
The "SIPOC analysis" offers a possibility
to identify missing or non-quantifiable
process inputs as important factors.
Supplier Input Process Output Customer
Supplier
Proc.-step 1
Proc.-step 1
Proc.-step 1
Proc.-step 1
Proc.-step 1
Input
Input
Input
Input
Input
Input
Input
Input
Input
Supplier
Supplier
Output
Output
Output
Output
Output
Output
Output
Output
Output
Customer
Customer
Customer
The "SIPOC Method" can be a good start for
narrowing down and analysis!
Start
End

4. By info@stefan-moser.com
The "Swim Lane Diagram" also
helps to draw conclusions about
important factors.
Uncontrolled
factors/noise
Controlled
factors
constant
conditions
Factors
process

5. By info@stefan-moser.com
Positional dispersion
within units
Cyclic dispersion from
unit to unit
Temporal dispersion
over production period
Quality
01,02,03,04,05 06,07,08,09,10, 11,12,13,14,15 16,17,18,19,20
“Control charts" can also provide
valuable information on factors,
especially disturbances.
Scatter maps help to classify factors in the
temporal dimension.

6. By info@stefan-moser.com
Discovered relationships can be
further deepened and analyzed in
an "Ishikawa diagram".
The fish bones can be labeled according to
the 7M, but occasionally your own headings
are more purposeful.
material
man
machine
Milieu
Scope
noun + verb
measurement
method
management

7. By info@stefan-moser.com
Some people love mindmaps!
“What makes work more efficient
and effective is goal-oriented”.
Occasionally, however, it makes sense to
start the method in silence, so that all
participants have their say.

8. By info@stefan-moser.com
If the same factors are always
examined, it is helpful to use the
"5 x Why" method.
This helps to find true reasons for causes by
consistent inquiries, .... nevertheless, please use
only with announcement, objectively and much
sensitiveness.

9. By info@stefan-moser.com
Is "5 x Why" too direct for you?
Then maybe "brainwriting" will help.
However, collaborative work requires that the rules
of appreciative communication are understood and
accepted.

10. By info@stefan-moser.com
It is always helpful to visualize the
results in the team, especially if
correlations are estimated.
small influence of the factor strong
harmful
effect
helpful
xxx
xxx
xxx
xxx
xxx
xxx
xxx
In the end, a common image, vocabulary and
understanding emerges.

11. By info@stefan-moser.com
Through systemic approach, the
"substance field analysis" helps to
detect self-reinforcing loops.
Destructive interaction
Positive interaction
Useful but inadequate interaction
Useful, but excessive
This helps to better classify factors for the
investigation.

12. By info@stefan-moser.com
Often, records of preliminary
investigations already exist to
facilitate further factor selection.
Structure analysis
Analysis of functions
Analysis of errors
Module 1.1
Module 1.1.1
Module 1.0
Function 1.1
Function 1.1.1
Function 1.0
Error 1.1
Error 1.1.1
Error 1.0
Module 1.1.2
Function 1.1.2
Error 1.1.2
FMEA &
PMEA

13. By info@stefan-moser.com
PCA/(O)PLS - Custer analyses is
ideal to classify important factors
from existing data.
Cluster
Koeffizienten
Cluster
Koeffizienten
Cluster
Koeffizienten

14. By info@stefan-moser.com
Are you missing something?
Then please leave a comment.
You want more of it then...
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15. By info@stefan-moser.com
Would you like to learn more about
DoE methods?
www.stefan-moser.com
info@stefan-moser.com