Foxtrot Systems learns a customer's location based on driver clicks. Depending on the quality of the clicks made, we can learn more or less quickly. The ideal is for the driver to click after delivering to the customer, in front of the customer and while he is parked (clicks in displacement do not contribute to learning), so that we can use GPS to understand the accuracy of the POS location.
If we have already received the latitude/longitude information from the POS of your company's system, we will use it on the map to show on the Route Analyzer, but we will use the information to optimize the route only after we have a confidence level of 75% of the POS (may vary as requested by your company).
Before we have a confident location in the Foxtrot system, we use several clicks from the drivers and the algorithm learns - for each driver - to automatically infer the position to mark the POS. That is, it can be in three or four clicks as it can be in twenty clicks, depending on where they were made.
Also, if there is a change in the location of the POS, the algorithm will understand as drivers make clicks in the new location.