Dataplot

• Question:

  Does the primary factor (X1) have an effect?

  What is the optimal level of the primary factor?

• Definition:

  Vertical Axis : Response

  Horizontal Axis: Nuisance (secondary) factors (X2, X3, X4)

  Plot character : Primary factor (X1)

• Interpretation/Conclusion:

  Factor 1 (X1) is statistically significant

  The optimal setting for factor 1 is X1 = 2

  There is no interaction between X1 and the 3 nuisance factors

  There exist 2 outlying (X2,X3,X4) conditions:

      (X2,X3,X4) = (1,1,2) and (2,2,1)

• NIST/SEMATECH Handbook Chapter:

  1. Process/Product Exploration

  2. Process Comparison

• Reference:

  Filliben

Dataplot Code:

SKIP 25

READ SHEESLE2.DAT Y X1 X2 X3 X4

CHARACTERS 1 2

LINES BLANK BLANK

BLOCK PLOT Y X2 X3 X4 X1

Dataplot Reference Manual Documentation
for BLOCK PLOT (requires Adobe Acrobat Reader)