4. PRESENTING FORECASTED DATA › 4.4 Presentation Technique Tutorial

4.4 Presentation Technique Tutorial

Presentation Graphics uses the historical observations and
forecasts that reside in the Capacity Planning database
files.  (The creation and use of these data sets is discussed
in Chapters 2 and 3.)  Figure 4-2 shows an example of a set
of these files.

                            +------------+
                            |   Screen   |
                            | Definition |
                            |  for File  |
                            |    xxx     |
                            +------------+
                                   |
                  +----------------+---------------+
                  |                |               |
  Creates         V                V               V
             +----------+    +----------+    +----------+
  Resource   | CAPxxx01 |    | CPFxxx01 |    | CPWxxx01 |
  Element    +----------+    +----------+    +----------+
  Files      |          |    |          |    |          |
             +----------+    +----------+    +----------+
    or            |               |               |
                  V               V               V
  Meta       +----------+    +----------+    +----------+
  Files      | CAPxxx02 |    | CPFxxx02 |    | CPWxxx02 |
             +----------+    +----------+    +----------+
    or       |          |    |          |    |          |
             +----------+    +----------+    +----------+
  Business        |               |               |
  Element         V               V               V
  Files           .               .               .
                  .               .               .
                  .               .               .

                  |               |               |
                  V               V               V
             +----------+    +----------+    +----------+
             | CAPxxxnn |    | CPFxxxnn |    | CPWxxxnn |
             +----------+    +----------+    +----------+
             |          |    |          |    |          |
             +----------+    +----------+    +----------+

              These files     These files     These files
              contain         contain         contain user
              actual data     forecasts       forecast data
                              from the        from the
                              forecasting     Worksheet
                              routines        Facility

 Figure 4-2.  Typical Capacity Planning Database Files

If you would like a more complete explanation of this file
structure, see Section 3.1.

It is important to remember that Capacity Planning forecast
files may contain more than one forecast for a single data
element.  This typically occurs when forecasts are produced
on a regular basis.  Hence, after the second time a forecast
is produced, the forecast file contains the forecasted
observations for both the current (most recent) forecast and
the previous forecast.  Presentation Graphics automatically
plots the observations for both the current and the previous
forecast.  If more than one previous forecast exists in the
forecast file, then you may optionally specify which of these
previous forecasts is to be plotted.