cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
The Discovery Summit 2025 Call for Content is open! Submit an abstract today to present at our premier analytics conference.
Get the free JMP Student Edition for qualified students and instructors at degree granting institutions.
Choose Language Hide Translation Bar
View Original Published Thread

2 constraints in custom DOE where the sum of two factors should be below 8 or greater than 18 hours

Sop
Sop
Level III

Hi,

I would like to run a custom DOE with 5 factors. 2 factors are related to time and due to work hours I have to ensure that the sum of those two factors either are below 8 hours OR greater than 18 hours. The first factor has 0.3 h as low level and 6 h as high whereas the second has 1 h and 20 h. The script below does not work, perhaps because there is an AND hidden...? thanks in advance

DOE(
	Custom Design,
	{Add Response( Maximize, "Y", ., ., . ),
	Add Factor( Continuous, 0.3, 6, "Time 1", 0 ),
	Add Factor( Continuous, 1, 20, "Time 2", 0 ), Set Random Seed( 979298838 ),
	Add Constraint( [1 1 8, -1 -1 -18] ), Add Term( {1, 0} ), Add Term( {1, 1} ),
	Add Term( {2, 1} ), Add Term( {1, 2} ), Add Term( {1, 1}, {2, 1} ),
	Add Term( {2, 2} ), Set Sample Size( 12 ), Optimality Criterion( 2 ),
	Simulate Responses( 0 ), Save X Matrix( 0 )}
);
1 ACCEPTED SOLUTION

Accepted Solutions


Re: 2 constraints in custom DOE where the sum of two factors should be below 8 or greater than 18 hours

Hi,

Try using a disallowed combinations constraint instead of linear inequality constraints.  I believe the following script may give you the design you want.

 

DOE(
	Custom Design,
	{Add Response( Maximize, "Y", ., ., . ),
	Add Factor( Continuous, 0.3, 6, "Time 1", 0 ),
	Add Factor( Continuous, 1, 20, "Time 2", 0 ), Set Random Seed( 979298838 ),
	Add Term( {1, 0} ), Add Term( {1, 1} ),
	Add Term( {2, 1} ), Add Term( {1, 2} ), Add Term( {1, 1}, {2, 1} ),
	Add Term( {2, 2} ), Set Sample Size( 12 ),
	Disallowed Combinations( Time 1 + Time 2 >= 8 & Time 1 + Time 2 <= 18 ),
	 Optimality Criterion( 2 ),
	Simulate Responses( 0 ), Save X Matrix( 0 )}
);

 

Laura

View solution in original post

2 REPLIES 2


Re: 2 constraints in custom DOE where the sum of two factors should be below 8 or greater than 18 hours

Hi,

Try using a disallowed combinations constraint instead of linear inequality constraints.  I believe the following script may give you the design you want.

 

DOE(
	Custom Design,
	{Add Response( Maximize, "Y", ., ., . ),
	Add Factor( Continuous, 0.3, 6, "Time 1", 0 ),
	Add Factor( Continuous, 1, 20, "Time 2", 0 ), Set Random Seed( 979298838 ),
	Add Term( {1, 0} ), Add Term( {1, 1} ),
	Add Term( {2, 1} ), Add Term( {1, 2} ), Add Term( {1, 1}, {2, 1} ),
	Add Term( {2, 2} ), Set Sample Size( 12 ),
	Disallowed Combinations( Time 1 + Time 2 >= 8 & Time 1 + Time 2 <= 18 ),
	 Optimality Criterion( 2 ),
	Simulate Responses( 0 ), Save X Matrix( 0 )}
);

 

Laura

Sop
Sop
Level III


Re: 2 constraints in custom DOE where the sum of two factors should be below 8 or greater than 18 hours

Thanks Laura, it works fine. Appreciate!