How to add "center or axial point" to fractional factorial design?

[#1]

Hi all,

I am trying to create a fractional factorial design for seven factors and one response. But I would also like to add "center or axial point" to the design to account for quadratic effect. I use quotation mark for the "center or axial point" because I don't know what to call these points. Essential these points that I want to add are center of one or two factor instead of all the factors.

I've tried CCD and screening design option in jmp, but couldn't find the design list I need.

[#2]

I mean replicate the entire experiment, but preferably in a randomized order generated by jmp program instead of manually repeating the same design table.

[#3]

Just save off the two DSD experiments and concatenate the tables so that you have the 34 runs. Then add a column to that table and using the column formula in the column attributes generate a random number. Then sort the table by that random column. This will result in a totally randomized replicated DSD.

[#4]

Which function are you using for the column formula?

I tried random->random integer(34), which gives me random number between 1 and 34. But the random numbers have replicates.

[#5]

You want to use random index:

Random Index( 1, 34 );

Best,

M

[#6]

Random index did not work.

Random Index(n, k)

Description

Returns a k by 1 matrix of random integers between 1 and n with no duplicates.

[#7]

I just use Random Uniform with no editing and have no duplicates due to the length of decimals.