3. Reports and Graphics › 3.1 Graphics › 3.1.11 Relationship Plots

3.1.11 Relationship Plots

                           PLOT OF TSOAVSTM*TSOAVUSR
Seconds
       |                                           +  + *  +
   2.0 +                                         +     ** +
       |   +                                          +*       +
       |                                          + +**+  +
   1.5 +        +                               +   * + +
       |                   +     +            +   +**     +
       |    +                               + +  **  +   +
   1.0 +                 +            +  +   +  * +    +
       | +    +    +          +  +  +   + *******  +           +
       |   +     +      +++ ++  + +******** +  +    +
    .5 + ++ +++++ ++++++************+ +  +
       |+ + *************++ ++ + +          +
       |*****+ ++++ ++++ ++++
     0 + + +    +         +
       -+---------+---------+---------+---------+---------+---------+
        0         50       100       150       200       250       300

                                  Number of Users

Figure 3-11.  Sample Relationship Plot


A relationship plot is a scatter plot (that is, values are
plotted without a connecting line) of x against y with a
linear, quadratic, or cubic regression line drawn to describe
the predicted relationship between the two elements.  Use
relationship plots to evaluate the relationship between two
measurements such as the number of concurrent TSO users and
response time.  They are especially useful in performance
analysis and capacity planning.

Optional parameters allow you to plot multiple relationships
on a single axis and scale.  For example, you could plot the
number of concurrent users against response time with a
separate line for each SYSID.  You can also control the color
and content of the chart axis scale, data element labels, and
printed value formats.

Figure 3-11 plots average short TSO response time against
average concurrent TSO users.  It shows the number of
concurrent users the configuration can support for a given
response time.  As illustrated, if the response time
objective is 1.0 seconds, the maximum number of users that
can be supported is 200.

To create a relationship plot, select the Relationship Plot
option from either of the following menus:

o  Direct Inquiry Color Graphics Color Plot Menu
o  Structured Inquiry Color Graphics Color Plot Menu

Note that relationship plots are only available in color.
This sample report simulates the basic format of a color
relationship plot.