*If a worker is not nearby a mission worker still can finish the mission. If you have let's say 500 worker in a project it won't be easy to track down which missions are correctly completed.
It is not easy to track down a lot of workers. We have a workforce project fully integrated with many other arcgis platforms such as dashboard and collector. If a worker completes the mission without being there, all the data we collect becomes unusable.
**In order to complete the mission worker must be inside of the described radius around the assignment mission **
An implementation or if there is a way to make this happen or any alternative to consider.