As you enter details for your application, Virtual Engineer is performing calculations in the background to determine certain calculated values. Using the below image as an example, based on the parameters I entered, the max velocity for the application is 0.15 m/s. However, if I know I actually need a max velocity of 0.3 m/s, I can put that value in the manual entry box. Conversely, I could enter a lower max velocity if what's being calculated is higher than what I need (which should provide more products to choose from). After you input the manual entry, Virtual Engineer will review the products currently listed as working for the application and update by removing or adding products accordingly.