Computed outflow volume vs Target is showing "Fail"

Question

My Computed outflow volume vs Target is showing "Fail" 
 Please Sir, What's the criteria to make that pass. or does it really matter in the design?

Yashodhan Joshi · Answer

Hello Simon, 
 If you look at the "Post-Development-1" scenario, the "Computed Peak Outflow vs. Target" two columns to the left of what you have marked is showing as "Fail". You can check for this criteria for your pond design. You can see that the computed peak outflow is higher than the target. 
 You can adjust this by either reducing the pond size, refining your outlet structure elements (such as riser, orifice) to bring this value below the target value which will show this scenario as "Pass". 
 See the below video to understand how this can be done using PondMaker; 
 
 For more details on using the PondMaker tool see the below article; 
 Using PondMaker 
 Hope this helps.

Scott Kampa · Answer

Hello Simon, 
 Go to the Options tab in the Worksheet Summary section at the bottom of PondMaker. There is a section on Routing Options. Here is a screenshot from a sample model: 
 
 You can adjust these targets as needed, but if the calculated value falls out of the target by more than the value here, it will be listed as failing. Adjusting the input of the model, as mentioned by Yashodhan above, would likely help it pass. 
 If that doesn't help, we can confirm this is occurring in a copy of the model . 
 Regards, 
 Scott