Relationship Plots

Use relationship plots to evaluate the relationship between two measurements such as the number of concurrent TSO users and response time.
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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 that is drawn to describe the predicted relationship between the two elements. They are especially useful in performance analysis and capacity planning.
Sample Relationship Plot
                           PLOT OF TSOAVSTM*TSOAVUSR Seconds        |                                           +  + *  +    2.0 +                                         +     ** +        |   +                                          +*       +        |                                          + +**+  +    1.5 +        +                               +   * + +        |                   +     +            +   +**     +        |    +                               + +  **  +   +    1.0 +                 +            +  +   +  * +    +        | +    +    +          +  +  +   + *******  +           +        |   +     +      +++ ++  + +******** +  +    +     .5 + ++ +++++ ++++++************+ +  +        |+ + *************++ ++ + +          +        |*****+ ++++ ++++ ++++      0 + + +    +         +        -+---------+---------+---------+---------+---------+---------+         0         50       100       150       200       250       300                                   Number of Users
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.
This chart 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:
  • Direct Inquiry Color Graphics Color Plot Menu
  • Structured Inquiry Color Graphics Color Plot Menu
Note:
The relationship plots are only available in color. This sample report simulates the basic format of a color relationship plot.