HP 3000 Manuals

HP RXForecast Users Manual for MPE Systems

Producing a Forecast 

You use the Linear, Exponential, S-Curve, or Business Units trending
methods to produce forecasts.

Use the Forecasts command under the Draw menu to access the Forecasts
command dialog box.  Do the following:

   1.  Change the Trending Method option to Linear.

   2.  Leave all other options as they are.


            

Before you draw the forecast, take another look at the dialog box.  In
particular, look at the X-Axis and Dates options.  On this dialog box,
the X-Axis is Year; the Dates (Start and Stop) encompass 6 months.  (The
Start date is displayed as Tue Mar 01 1988.  To see the Stop date, click
on the scroll box and move it back slightly.)

When you forecast, the relationship between the X-Axis option and the
Dates option is important.  The Dates option defines how much data you
are going to forecast from.  The X-Axis determines the combined time
allotted for actual data and the forecast.  In other words, your forecast
time is the X-Axis less the actual data.  So, for example, if you choose
2 months of data through the Dates option and an X-Axis of 6 months, your
forecast is for 4 months. 


Tip  A good rule of thumb is to produce a forecast as long as your data.
     A forecast that is longer than the data upon which it is based
     becomes less reliable.


   3.  Now click on  OK to see the forecast.


          Job CPU Utilization Graph, Linear Method 

Close the graph.

MPE/iX 5.0 Documentation