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

Note: Best design for m=3, p=9 and n=15.

try #     	1
seed      	1230957680968
# of iterations	6
f         	5
det       	3.62393472E9
std. det  	0.09426686
TF        	0.9907

Factor levels (columns 3-5):

-1	1	-1	1	1	
-0.8571	0.5714	1	-1	1	
-0.7143	0.2088	-1	-1	-1	
-0.5714	-0.0879	1	1	-1	
-0.4286	-0.3187	1	-1	-1	
-0.2857	-0.4835	-1	-1	1	
-0.1429	-0.5824	-1	1	-1	
0	-0.6154	1	1	1	
0.1429	-0.5824	-1	1	-1	
0.2857	-0.4835	1	-1	-1	
0.4286	-0.3187	-1	-1	1	
0.5714	-0.0879	-1	1	1	
0.7143	0.2088	1	-1	1	
0.8571	0.5714	-1	-1	-1	
1	1	1	1	-1	

X'X

5.7143	0	-0	0.2857	0	-0.8571	1.4286	0	-0.8571	
	4.4835	0	0.5495	0.0879	0.5495	0.5495	-0.4396	0.5495	
		15	-1	-1	-1	-1	-1	-1	
			15	-1	-1	-1	-1	-1	
				15	-1	-1	-1	-1	
					15	-1	-1	-1	
						15	-1	-1	
							15	-1	
								15	

inverse(X'X)

0.1822	0	0	-0.0033	-0	0.0098	-0.0163	-0	0.0098	
	0.2287	-0.0029	-0.0108	-0.0042	-0.0108	-0.0108	0.0034	-0.0108	
		0.0695	0.0071	0.007	0.0071	0.0071	0.0069	0.0071	
			0.07	0.0071	0.0073	0.0077	0.0068	0.0073	
				0.0695	0.0071	0.0071	0.0069	0.0071	
					0.0705	0.0066	0.0068	0.008	
						0.0714	0.0068	0.0066	
							0.0695	0.0068	
								0.0705	

Note: RAT used 0.016 seconds.