| DesignBuilder v4.0 has these limitations related to Optimisation:   | 1. | You must run a simulation with monthly/annual output for the model (on the Analysis tab) before clicking on the optimisation tab. If you don’t have any monthly/annual results on this tab then you must re-run the base simulation before updating the optimisation analysis. | 
| 2. | The Daylight availability KPI is not yet enabled but we hope to have this working soon. | 
| 3. | It isn't possible to store multiple optimisation results sets within the DesignBuilder model. | 
  See also Optimisation Tips and Tricks   |