11. WORKLOAD CHARACTERIZATION › 11.5 Component Operation › 11.5.8 Statistical Analysis Parameters Screen

11.5.8 Statistical Analysis Parameters Screen

Figure 11-15 illustrates the Statistical Analysis Parameters
screen.

/---------------------  Statistical Analysis Parameters  ----------  ROW 1 OF 5 \
|Command ===>                                                  Scroll ===> CSR  |
|                                                                               |
|Inquiry Step:  Workload Characterization                                       |
|                                                                               |
|Sample size                    ===> 2000   (nnnnnn)                            |
|Observation trimming (percent) ===> 97.5   (nn.n)                              |
|Objective radius               ===> 1.5    (1.0-2.0)                           |
|                                                                               |
|Delete observations if the following elements contain SAS missing values or 0: |
|                                                                               |
|Cmd Element    Data element label (long name)              Warning             |
| -  --------   ----------------------------------------    --------            |
| _  ________                                                                   |
| _  ________                                                                   |
| _  ________                                                                   |
| _  ________                                                                   |
| _  ________                                                                   |
|****************************** BOTTOM OF DATA  ********************************|
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                               |
\------------------------------------------------------------------------------/

 Figure 11-15.  Statistical Analysis Parameters Screen

The Statistical Analysis Parameters screen allows you to
specify the statistical parameters that will be used in the
workload characterization analysis.  The available parameters
are described below.

Sample size:  The sample size to be used for the clustering
              procedure.  The default sample size, which is
              2,000, should prove suitable for populations as
              large as 500,000.

Observation   The percent of the distribution to be included
trimming      when the trimmed mean and standard deviation
(percent):    are calculated.  The default value is 97.5%.

Objective     The objective radius for the clusters to be
radius:       created.  The default value is 1.5 standard
              deviations.

This screen also allows you to specify deletion for any input
observation that has a zero or missing value for a specified
data element name when it is read from the CA MICS database.
For example, in a job class study you might wish to delete
the observations for any jobs whose TCB CPU time is zero or
missing.  To do so, you would code JOBTCBTM in the Element
field of the display table at the bottom of the screen.  You
can specify only numeric variables.  To obtain additional
lines, enter an I in the Cmd column of any of the rows in the
display portion of the screen.