| Ø | Select the Equations tool. Modify the constants in the model to reflect the values given by the optimization. You will probably only want the first two or three significant figures. |
The values from the optimizer should be, or be close to:
conversion fraction = 0.0055
household addition rate = 0.013
initial fraction electric = 0.055
initial households = 2.0e+007
It is important to note that getting a model to fit the data well does not prove the model right. When a model fits the data it means the model cannot be rejected because of the data. It is important to look for other ways to find deficiencies with a model. Reality Checks, described in Chapter 14 are a very powerful tool for doing this.
