RAT 6.1: Robust Against Trends Program
(c) 2009 Design Computing (designcomputing.net/)

Note: Best design for m=4, p=16 and n=27.

try #     	31
seed      	1562481558
# of iterations	19
f         	0.05
det       	3.0329934E13
std. det  	3.8023426E-10
TF        	1

Factor levels (columns 2-5):

-1	1	-1	0	0	
-0.9231	0	-1	0	-1	
-0.8462	-1	0	1	0	
-0.7692	1	1	0	0	
-0.6923	0	0	-1	1	
-0.6154	0	1	-1	0	
-0.5385	0	0	1	1	
-0.4615	-1	0	-1	0	
-0.3846	0	1	1	0	
-0.3077	-1	0	0	-1	
-0.2308	0	1	0	-1	
-0.1538	-1	0	0	1	
-0.0769	0	0	0	0	
0	0	0	0	0	
0.0769	0	0	0	0	
0.1538	0	-1	0	1	
0.2308	1	0	0	-1	
0.3077	1	0	0	1	
0.3846	0	-1	-1	0	
0.4615	1	0	1	0	
0.5385	0	0	-1	-1	
0.6154	0	-1	1	0	
0.6923	0	0	1	-1	
0.7692	-1	-1	0	0	
0.8462	1	0	-1	0	
0.9231	0	1	0	1	
1	-1	1	0	0	

X'X

9.6923	-0	0.0769	-0.0769	-0	0	0.0769	-0.0769	0	0	0	0	-0.0769	-0	0.0769	0	
	27	12	12	12	12	0	0	0	0	0	0	0	0	0	0	
		12	4	4	4	0	0	0	0	0	0	0	0	0	0	
			12	4	4	0	0	0	0	0	0	0	0	0	0	
				12	4	0	0	0	0	0	0	0	0	0	0	
					12	0	0	0	0	0	0	0	0	0	0	
						12	0	0	0	0	0	0	0	0	0	
							12	0	0	0	0	0	0	0	0	
								12	0	0	0	0	0	0	0	
									12	0	0	0	0	0	0	
										4	0	0	0	0	0	
											4	0	0	0	0	
												4	0	0	0	
													4	0	0	
														4	0	
															4	

inverse(X'X)

0.1032	0	-0.001	0.001	-0	-0	-0.0007	0.0007	-0	-0	-0	-0	0.002	0	-0.002	-0	
	0.3333	-0.1667	-0.1667	-0.1667	-0.1667	-0	0	-0	-0	-0	-0	0	0	-0	-0	
		0.1875	0.0625	0.0625	0.0625	0	-0	0	0	0	0	-0	-0	0	0	
			0.1875	0.0625	0.0625	-0	0	-0	-0	-0	-0	0	0	-0	-0	
				0.1875	0.0625	0	-0	0	0	0	0	-0	-0	0	0	
					0.1875	0	-0	0	0	0	0	-0	-0	0	0	
						0.0833	-0	0	0	0	0	-0	-0	0	0	
							0.0833	-0	-0	-0	-0	0	0	-0	-0	
								0.0833	0	0	0	-0	-0	0	0	
									0.0833	0	0	-0	-0	0	0	
										0.25	0	-0	-0	0	0	
											0.25	-0	-0	0	0	
												0.25	0	-0	-0	
													0.25	-0	-0	
														0.25	0	
															0.25	

Note: RAT used 0.422 seconds.