This chapter addresses the how to run the HERS-ST analysis.
After you have defined the Workset, specified your data sources, and set the control parameter and output settings, you are ready to run the analysis. To start the analysis, select the File/Run HERS-ST menu option or click the run button on the tool bar. The HERS-ST software will then present you with the run wizard.
The HERS-ST Run wizard allows you to select various run options and start the analysis. In the dialog window (Figure 8-1), HERS-ST displays a list of the items that are selected in the Workset tree. These are the items that will be used to run the HERS-ST analysis.
The Scenario name and description are prefilled with values taken from the selected Control settings displayed in the list. These are default values and you may change them if you wish. Changing these values does not affect the original values in the Control settings.
At a minimum, the HERS-ST software requires a highway data item and control and parameter items. If any one of these three items are not included, then the Run button will be disabled.
Figure 8-1. HERS-ST Run Wizard (Items).
The Objective page (Figure 8-2) allows you select the analysis type objective that the HERS-ST analysis will use. Depending on the objective and options selected here, other wizard pages may appear as needed. There are four types of analysis.
This page is pre-loaded with the values from the selected Control settings. You may change them here if you wish. Any changes you make to these setting will be applied to this run only; the original values in the Control settings are not affected.
Chapter 3 describes each of the four types of analysis objectives in more detail.
Figure 8-2. HERS-ST Run Wizard (Objective).
Multiple Minimum BCR Runs. When performing a multiple minimum BCR analysis, HERS-ST will automatically change the minimum BCR value between each run. When selecting multiple runs, you must specify the starting, ending, and increment value to be assigned to the minimum BCR for each run. The number of runs conducted by the HERS-ST analyzer will depend upon the size of the minimum BCR range and the value of the increment.
Funding Constrained Run. When performing a funding constrained run, you must specify the amount of funding available for each funding period. You will be given an opportunity to enter funding levels later.
Performance Constrained Run. When performing a performance constrained run, you must either use the current conditions as your performance goal or specify the goals yourself. If you choose to specify the goals, you will be given an opportunity to enter those goals later.
The Analysis Options page allows you to select options that affect the HERS-ST analysis.
The Intermediate Year data file is discussed in more detail in Chapter 6.
Figure 8-3. HERS-ST Run Wizard (Options).
This page (Figure 8-4 ) allows you to design a multiple run analysis. When performing a Sensitivity or Continuation Analysis you must specify which Control and Parameter settings are to be used for the iterations of the analysis. You can also enter a run name for each iteration. This page will appear only if you have chosen to perform a Sensitivity or Continuation run on the Analysis Options page.
This page will appear only if you have chosen to perform a Sensitivity or Continuation run.
Figure 8-4. HERS-ST Run Wizard (Multiple Runs).
The Available Funds or Performance Goals page (Figure 8-5) allows you to specify the constraint criteria used when performing one of the constrained analysis types. This page is pre-loaded with the values from the selected Control settings. You may change them here if you wish. Any changes you make to these settings will be applied to this run only; the original values in the Control settings are not affected.
This page will appear only if you have selected a funds constrained analysis or a performance constrained analysis.
Figure 8-5. HERS-ST Run Wizard (Funds / Goals).
The Deficiency Levels page (Figure 8-6) allows you to specify the engineering design criteria used as the deficiency level thresholds that determine if an improvement is required.
This page is pre-loaded with the values from the selected Parameter settings. You may change them here if you wish. Any changes you make to these settings will be applied to this run only; the original values in the Parameter settings are not affected.
This page will appear only if you have selected a full needs analysis.
Figure 8-6. HERS-ST Run Wizard (Deficiency Levels).
The HERS-ST analysis consists of two parts, the pre-processor and the HERSST analyzer. Both parts execute in a DOS window and will scroll status information about the execution (Figure 8-7). During the time while the DOS window is displayed, the rest of the HERS-ST application is locked.
Figure 8-7. HERS-ST DOS Window.
The pre-processor is executed prior to the analyzer. If the pre-processor generates any error or warning messages, the analysis execution is halted and you are given a choice to either review the messages or ignore them and continue with the HERS-ST analysis (Figure 8-8).
Refer to the HERS-ST technical information for further information on the error and warning messages encountered here.
Figure 8-8. Warning Message Dialog.
If you chose to halt the analysis execution to review the error or warning messages, you can then determine if they are of any consequence. The messages are displayed in your system text editor. After reviewing them you are given a choice to either terminate the analysis or ignore the messages and continue (Figure 8-9).
Figure 8-9. Warning Message Dialog.