Introduction
What is the time of evaluation? Why is it important to choose the correct one? What happens when you choose the wrong time-step?When you set up a Function or a Modelled Variable, you get to choose which simulation phase(s) you want to evaluate at. In order for the correct information to be used in the function, and for the function to be evaluated in time to be used in the location selected, its important to choose the correct time of evaluation(s).
Time of Evaluations
| Time of Evaluation | Notes |
|---|---|
| Start of TimeStep | |
| Resource Assessment | |
| Ordering Phase | |
| Flow Phase | |
| Post Flow Phase | |
| End of TimeStep | |
| Post Function Evaluation | Only available for Modelled Variables |
Resource Assessment Time of Evaluation
If you choose Resource Assessment as the Function or Modelled Variable will be evaluated before each Resource Assessment System is processed. This could obviously result in multiple evaluations.
Ordering/Flow Phase Time of Evaluation
Each function can be used in one or more model inputs. Each model input
Which Time of Evaluation(s) to choose
A lot of the power, and confusion, when setting up a function is based around when to choose to evaluate a function or modelled variable. One important note here is that there will most likely be multiple solutions which will work. To understand where each of the choices fits in within the larger scheme of the model phases please review ......
Suggestion: Each element in Source is evaluated at a different time-step, depending on its .... (what word can be used here?).
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