eldo_user

Conducting a Screening Experiment
Guidelines for using the .DEX command and its arguments.
To use the .DEX command, you must provide the following:
• A working netlist.
Statistical Experimental Design and Analysis
Conducting a Screening Experiment
• The factors. In the netlist you must specify the parameters (factors) that will be
considered by the .DEX command when conducting the experiment. Factors are
specified by adding minor modifications to the working netlist, using the .PARAMDEX
command. For more information see “Designing a Screening Experiment” on page 562
and “Selecting the Number of Factors and the Design Matrix” on page 574.
• A response function which defines the list of measures to be considered in the
experiment. These measures are specified by the .EXTRACT and .MEAS commands in
the netlist.
• A type of experiment to be conducted. For more information see “Choosing the Type of
Experiment” on page 573.
• A design matrix which may either be an orthogonal array based on Hadamard matrices
or a full factorial design. For more information see “Selecting the Number of Factors
and the Design Matrix” on page 574.
Tip
For more information on the .DEX command see “.DEX” in the Eldo Reference Manual.
Choosing the Type of Experiment
This section describes the alternatives for the EXPERIMENT option in the .DEX command.
The regression model used in the DEX analysis is:
The y 0 , α’s and the β’s are a set of unknown coefficients.
To estimate the values of these parameters, the DEX analysis collects data on the system under
study. When no distinction can be made among the factors, the y 0 , α, β are estimated within the
same experiment. For this kind of experiment use EXPERIMENT=SCREENING in the .DEX
command.
Eldo® User's Manual, 15.3 573