Now you are ready to compute an HEC-RTS forecast. The Modeling module (Modeling Module - Forecast Information Displayed) displays the time information associated with an active forecast, and a list of forecast runs associated with that active forecast. For the active forecast, you can compute for a single forecast run or for compute multiple forecast runs. There are several ways to compute an HEC-RTS forecast and the following sections describe in detail how you would execute a single forecast run or execute multiple forecast runs.

You can also change the behavior of a forecast run compute, by telling the compute to skip a model alternative (Forecast Run Details) or tell the compute to execute through a specific model alternative (Forecast Run Details).

Computing a Single Forecast Run

When a forecast run is highlighted, from the HEC-RTS main window, click the Modeling tab, from the Forecast Tabs, click Actions (Figure 1). Click Compute (Figure 1), the Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Another option for computing a single forecast run is, from the Forecast Run Details Area of the Modeling module, right-click on a forecast run, from the shortcut menu, click Compute. The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

An additional way to compute an individual forecast is, from the HEC-RTS main window, click the Modeling tab, from the Forecast menu, click Compute Manager. The Compute Manager dialog (Figure 3) will open, select the forecast run your wish to compute, click Compute. The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Computing Multiple Forecast Runs

HEC-RTS provides you with a way to execute more than one forecast run at one time, from the main window, click the Modeling tab, from the Forecast menu, click Compute Manager. The Compute Manager dialog (Figure 3) will open, select all forecast runs you want to compute, click Compute. The Compute Progress dialog will open (Figure 2) and the highlighted forecast run will be computed.

Recompute Forecast Runs

When a forecast run is executed, HEC-RTS remembers what HEC-RTS models executed for that forecast run. If changes were made to a model in the forecast sequence, HEC-RTS will re-compute the model when you compute the sequence. If no changes were made to a model and the model was previously computed, HEC-RTS will not recompute the model in the sequence. If for some reason you need to recompute the entire model sequence for a forecast run, from the Modeling module, from the Actions tab (Figure 1), click the Force Recompute check box. This will "force" a full recompute of the selected forecast run when you click Compute (Figure 1). The Compute Progress dialog (Figure 2) will open and all the models will be run.