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albiruni81
Level II

Classical Screening design vs Definitive Screening Design

Hi All,

 

Anyone can give me a summary of difference between a classical screening design and DSD? What are the advantages and disadvantages between this two methods

 

Rgrds

 

Irfan

11 REPLIES 11
txnelson
Super User

Re: Classical Screening design vs Definitive Screening Design

Here are a couple of references:

Jones, B. and Nachtsheim, C. (2011a). Efficient Designs With Minimal Aliasing. Technometrics, 53, 1, 62 – 71.

Jones, B. and Nachtsheim, C. (2011b). A Class of Three-Level Designs for Definitive Screening in the Presence of Second-Order Effects. Journal of Quality Technology, 43, 1, 1 – 15.

Also, here is a link to Brad Jones' 2015 Discovery Presentation

A New Analytical Approach for Definitive Screening Designs

Jim
albiruni81
Level II

Re: Classical Screening design vs Definitive Screening Design

Thanks Jim
cwillden
Super User (Alumni)

Re: Classical Screening design vs Definitive Screening Design

DSDs are really somewhere between a screening and an RSM.  The general idea is you can screen a large number of factors and still fit a decent response surface to the active effects in one very efficient design.  The drawback is that they are far less trivial to analyze.  Over the last several years, a lot of work has been done on how to best analyze DSDs, and JMP has a dedicated analysis platform for DSDs now.  It would be worthwhile to study up on that methodology using the links @txnelson provided, as well as Brad Jones' talk at the most recent JMP Discovery.

Classical screening focuses on designs with 2-level factors to determine active main effects, usually 2-factor interactions, and sometimes higher order interactions.  You can add center points to detect curvature, but you cannot model the resulting curvature because the source of the curvature is ambiguous with multiple continuous factors.  The benefit is they are very easy to analyze.

-- Cameron Willden
albiruni81
Level II

Re: Classical Screening design vs Definitive Screening Design

Hello Cameron,

Thank you for you reply

When yu are saying that JMP has a dedicated platform for DSD what do you mean by that?Where can i get this option from?

Rgrds

Irfan

txnelson
Super User

Re: Classical Screening design vs Definitive Screening Design

DSD is available from the pull down menus

      DOE==>Definative Screening==>Definitive Screening Designs

 

BTW, Brad Jones, the co inventor of DSD, is a long time employee with JMP

Jim
albiruni81
Level II

Re: Classical Screening design vs Definitive Screening Design

Hello Jim,

 

Is this how we analyze the DSD table?

 

JMP DSD.pngR

Rgrds

 

Irfan

txnelson
Super User

Re: Classical Screening design vs Definitive Screening Design

If you already have a defined DSD, and you are just looking to analyze the data, the answer is yes.  If you need to setup a DSD, then you would select Definitive Screening Design.

 

Full documentation on this is covered in the DOE Guide.  See:

     Help==>Books==>Design of Experiments Guide

Jim
albiruni81
Level II

Re: Classical Screening design vs Definitive Screening Design

Thanks jim, does it mean that DSD is the way to go as opposed to the classical screening design?
txnelson
Super User

Re: Classical Screening design vs Definitive Screening Design

yes........

Jim