SOD 6.2: Second-order designs program
(c) 2010 Design Computing (designcomputing.net/)

Note: Best design for 4 factors in 16 runs.

try #     	1
seed      	1284350766931
# of iterations	4
f         	82.38 (0)
det       	2.4159191E10
det*      	0.3077

Factor levels:

(1)	(2)	(3)	(4)	
1	0	0	0	
-1	0	0	0	
0	1	0	0	
0	-1	0	0	
0	0	1	0	
0	0	-1	0	
0	0	0	1	
0	0	0	-1	
1	1	1	1	
1	-1	1	-1	
1	-1	-1	1	
-1	-1	1	-1	
-1	-1	-1	1	
1	1	-1	-1	
-1	1	1	1	
-1	1	-1	-1	

X'X

16	10	10	10	10	0	0	0	0	0	0	0	0	0	0	
	10	8	8	8	0	0	0	0	0	0	0	0	0	0	
		10	8	8	0	0	0	0	0	0	0	0	0	0	
			10	8	0	0	0	0	0	0	0	0	0	0	
				10	0	0	0	0	0	0	0	0	0	0	
					10	0	0	0	0	0	0	0	0	0	
						10	0	0	0	0	0	0	0	8	
							10	0	0	0	0	0	8	0	
								10	0	0	0	8	0	0	
									8	0	0	0	0	0	
										8	0	0	0	0	
											8	0	0	0	
												8	0	0	
													8	0	
														8	

inverse(X'X)

0.2361	-0.0694	-0.0694	-0.0694	-0.0694	0	0	0	0	0	0	0	0	0	-0	
	0.4028	-0.0972	-0.0972	-0.0972	0	0	0	0	0	0	0	0	0	-0	
		0.4028	-0.0972	-0.0972	0	0	0	0	0	0	0	0	0	-0	
			0.4028	-0.0972	0	0	0	0	0	0	0	0	0	-0	
				0.4028	0	0	0	0	0	0	0	0	0	-0	
					0.1	0	0	0	0	0	0	0	0	-0	
						0.5	0	0	0	0	0	0	0	-0.5	
							0.5	0	0	0	0	0	-0.5	-0	
								0.5	0	0	0	-0.5	0	-0	
									0.125	0	0	0	0	-0	
										0.125	0	0	0	-0	
											0.125	0	0	-0	
												0.625	0	-0	
													0.625	-0	
														0.625	

Note: Non-zero sums of squares contributing to f:
234 (8)
1122 (8)
1133 (8)
1144 (8)
2233 (8)
2244 (8)
3344 (8)

Note: The first 8 run(s) form the base design.
Note: SOD used 0.0030 seconds.