Tandem Capacity Model (TCM) Manual

Screen Descriptions
Help is available for fields on all the Performance model screens by selecting the field you want
information about and selecting Help > TCM Help.
The Read-only (protected) and User-modifiable (unprotected) fields of the screens have different
background colors for easy identification. The default background of the Read-only fields is brown,
and that of the User-modifiable fields is yellow.
In the Consumption Model, Planning Timeline Model, CPU Factors, Disk Factors, and Plan Baseline
Detail by Category screens, whenever the formula of any Usermodifiable cell is overwritten with
a value, the font of that cell becomes bold and takes on the color of the text 'Manual Overwrite
Font ColorIndex' in the User Customization screen. The Default Manual Overwrite color is blue.
Therefore, if you can easily see where custom changes have been made.
The significant rows and columns of each screen are described in the following sections.
Capacity Baseline—Actual Screen
This screen summarizes the source data for the Performance model. It has the same data as the
WA model.
This screen is used as the baseline from which the Performance model algorithms derive the
projections used in the Consumption and Planning Timeline models.
The throughput and cost in CPU and disk seconds for each transaction are summarized. Similar
information is shown for the average (weighted) transaction as well as for consumption that is
fixed. The fixed category is used for activity that does not increase as throughput increases (for
example, some types of asynchronous data communication polling or the HP Measure product).
Figure 44 (page 138)Figure 9-1 shows a sample Capacity Baseline–Actual screen.
Figure 44 Capacity Baseline—Actual Screen
138 The Performance Model