Minitab does not express it in terms of a contribution ratio (other than in the Gage R&R routine). You can use the variance components table and the formula that you posted previously to manually calculate the ratio.

I tried to calculate it using my formula from the 1st post. As it is visible I have F value (Variance). I am not sure what should I treat as a Mean value: Seq SS or Adj SS and what treat as a MEAN Square variance error and as Total sum of squares?

However, If I know that information still I do not know how to calculate contribution of each factor using that formula. The Analysis of Variance for AVERAGE Option 1 (coded units) presents only values for Main effects and interactions. I would like to know what is the contribution of each factor.

Just to make it clear I was doing L16 Full factorial design replicated two times, using two blocks. However, I've found those blocks irrelevant as a p-value was very high around 0.800

Factorial Fit: AVERAGE Option 1 versus SPEED; FEED; OPt1; OPt2

Estimated Effects and Coefficients for AVERAGE Option 1 (coded units)

Term Effect Coef SE Coef T P

Constant 6,88843 0,01274 540,78 0,000

A -0,06805 -0,03402 0,01274 -2,67 0,018

B -0,04431 -0,02215 0,01274 -1,74 0,104

C -0,09201 -0,04600 0,01274 -3,61 0,003

D -0,10069 -0,05034 0,01274 -3,95 0,001

AB 0,07706 0,03853 0,01274 3,02 0,009

AD -0,05281 -0,02641 0,01274 -2,07 0,057

AC -0,01113 -0,00556 0,01274 -0,44 0,669

BC 0,00368 0,00184 0,01274 0,14 0,887

BD -0,06132 -0,03066 0,01274 -2,41 0,030

CD 0,06673 0,03336 0,01274 2,62 0,020

ABC -0,00120 -0,00060 0,01274 -0,05 0,963

ABD 0,05989 0,02994 0,01274 2,35 0,034

BCD 0,05646 0,02823 0,01274 2,22 0,044

ACD -0,02617 -0,01309 0,01274 -1,03 0,322

ABCD -0,03578 -0,01789 0,01274 -1,40 0,182

S = 0,0679362 PRESS = *

R-Sq = 85,34% R-Sq(pred) = *% R-Sq(adj) = 69,63%

Analysis of Variance for AVERAGE Option 1 (coded units)

Source DF Seq SS Adj SS Adj MS F P

Main Effects 4 0,184235 0,161772 0,040443 8,76 0,001

2-Way Interactions 6 0,129173 0,110231 0,018372 3,98 0,016

3-Way Interactions 4 0,053604 0,056200 0,014050 3,04 0,053

4-Way Interactions 1 0,009103 0,009103 0,009103 1,97 0,182

Residual Error 14 0,064615 0,064615 0,004615

Pure Error 14 0,064615 0,064615 0,004615

Total 29 0,440729