The dynamic property in accumulation (or buffering) indicates that the system can react to (in other words, absorb) speed variations between the machines its connected to on the fly. If one of the two machines runs either faster or slower than the other, the dynamic accumulator can instantly speed up or ramp down and start accumulating products or feed out more products when nessecary. This prevents jams, stops or other disruptions from happening in the up or downstream of the connected machines.