So far, we've been adding weighted steering forces together and applying forces when certain thresholds have been met, but what does all this really do to an agent's locomotion? The two most common techniques that are used to add different steering forces together are through a weighted sums approach or a priority-based approach.
A weighted sums approach takes all the steering forces into account all the time using fixed coefficients that weigh each force against every other. While this is very intuitive with a small number of forces, it can get very hard to balance competing forces together when a large number of different steering forces are being used.
Typically, this should be your first approach to get the agents to move, but when complex situations need to be handled, it's better to go with a priority-based approach.