From the Sampling Options screen or the Error
Analysis Sampling Options screen, select Data File from the Technique list.
Enter the File that you want to use with the
technique. You can click Browse to specify the
file that contains the values you want to use.
The file must contain a column of values for each factor (or a row
if the Data is transposed option is selected),
with columns separated by a tab, space, or comma. Use a header row to
identify the parameters that correspond to the columns. You must enclose
names or values with spaces in quotation marks. Note:
A file parameter is added to the component to represent
this file, allowing you to map in a new file at run time.
Click Use header row if your data file has a
header row containing the factor names. Specify which row contains the
names of your factors by entering its corresponding number. If you do
not select this option, you must explicitly specify which column each
factor is associated with on the Factors tab.
Enter the row number on which your data begins in the Data
starts on row text box. If you are using a header row, the
specified row number must be greater than the header row number.
In the Format list, select Levels
or Values to specify whether the file contains
level numbers (e.g., 1, 2, 3, etc.) or actual parameter values. If you
select Levels, additional factor attributes are
available to define how to calculate values from the levels.
Click Store in model if you want the current
file’s contents stored in the model for use when the component executes. If this option is not selected, the component attempts to access the specified file on the computer on which it executes.
Click Advanced Options, and set the following
options, as desired: - Click File contains responses if you do not want
the DOE component to actually execute an Isight
subflow for each design point but to instead read the response values
for each design point from a specified file. The first row of the file
must contain the parameter names and each subsequent row must contain
the values for the parameters for that design point. This feature is
useful when you have a complete data set (input and output values) already
compiled and want to use DOE as a postprocessing tool.
- Click Data is transposed if you want to use
a data file in which each row represents a set of values for the parameter
whose name is the first item in that row (the file is transposed from
the standard format in which each column represents a parameter and its
values). A transposed data file must have the parameter name as the first
item in the row (enclosed in quotation marks if spaces exist), and each
row must have the same number of values in it.
Select Execute design points in parallel if you
want to execute all the design points defined by the design matrix for
execution simultaneously. You can use this option only if you are using a multiple CPU system
or if you are connected to a SIMULIA Execution Engine. Click Next. The DOE Factor Attributes screen appears. If desired, change any of the values for the factor. The values that
are available will depend on the technique you selected.
| Option |
Description |
|---|
| # Levels |
The number of levels at which you want
to study the factors. A change to this attribute automatically readjusts
the levels for this factor. |
| Levels |
A space-separated list of the levels
at which to study the factor. The related attributes are updated once
you click in a different cell. |
| Lower/Upper |
The lower/upper levels for the factor.
A change to one of these attributes automatically calculates new levels
evenly distributed between the lower and upper values. |
| Relation |
Specifies whether the levels are interpreted
as values or as %/difference (diff) from a specified
baseline. |
| Baseline |
The value used for converting levels
into values when the relation is % or diff. |
| Column |
If
you specified to not use a header row to find factors in
the file, you must provide the column number for each factor. |
Click Update factor baselines to current values when executing
if you want the baseline values updated to the current parameter values
before executing. If Isight
previously modified a parameter, this option allows for automatic updating
of the baseline of all factors to the current parameter values in Isight,
prior to executing the DOE technique, which will readjust the values
to be studied appropriately. By default, this option is not selected
and the user-defined settings are retained. This option is useful if
the DOE technique is executed after another element of the simulation
process flow that might change the parameter values (e.g., after an Optimization
component), so that the DOE study can be performed around the new design
point. Click Next. The DOE Design Matrix screen appears. This screen displays the design matrix generated for the specified
technique and the factors selected and attributes specified. Click in the Show list to
select how you want the design matrix displayed.
| Option |
Description |
|---|
| Values |
The actual values to be set at execution. |
| Levels |
The level number as generated by the
technique algorithm. |
Perform any of the following actions to manipulate the design matrix:
| Option |
Description |
|---|
| Deactivate a single design point |
To deactivate
a design point so that it is not executed (the  icon appears), click any row number. You
can also click the  button at the top of the design matrix, or right-click
the design matrix and select Skip selected design point(s). |
| Deactivate all design points |
To deactivate all
design points in the design matrix, highlight all the design points and
click the button. You can also right-click the design matrix and
select Skip all design points. Note:
Deactivating design points is useful when it is known
that a specific set of values in the design matrix represents a design
that cannot be evaluated for whatever reason.
|
| Activate a design point |
To activate a design
point that has been set to be skipped, click the icon that represents the design point.
The row number reappears. You can also click the  button at the top of the design matrix, or right-click
the design point and select Activate selected design point(s). |
| Activate all design points |
To activate all the
design points in the design matrix, highlight all the design points and
click the button. You can also right-click the design matrix and
select Activate all design points. |
| Add user-defined points to the matrix |
To add
any design point to the design matrix, enter a value for each factor
into the empty last row in the table. Typically, the selected DOE technique
generates a matrix based on the options and factors selected, but you
can add any design points to the matrix. The DOE component will fail
to execute if any user-defined point does not have a value for all factors
(the cells with missing values for user-defined points are highlighted
in pink). |
| Paste user-defined points from the clipboard. |
To add a set of points
that are already defined in a file, you can copy and paste them directly
into the design matrix as new user-defined by right-clicking and selecting
Paste new user-defined points. Pasting new user-defined
points will always append the points to the matrix (regardless of whatever
cell was selected). If factor names are found in the first row of the
copied data, Isight
uses those names to identify the appropriate columns of data; otherwise;
values are pasted in the same order as they exist in the pasted content.
You must confirm that the values pasted are appropriate for the factors
in those columns. |
| Remove user-defined points from the matrix. |
To remove any user-defined
points from the matrix, clear the values from all cells in that row or
right-click and select Remove selected user-defined point(s)
or Remove all user-defined points. |
| Copy the design matrix |
To copy the design matrix
to the clipboard so that it can be pasted elsewhere (e.g., in a text
file), click the Copy  button above the design matrix or right-click the design
matrix and select Copy design matrix. |
| Save the design matrix |
To save the design matrix
to a file, click the Save  button above the design matrix or right-click the design
matrix and select Save. |
|