Each loop adds to earlier loops. One loop can be significantly different from the other, even when the same product is purchased in the same company. A supplier decision is only perceived to occur in modified rebuys and new tasks. The most frequent decision is to remain with the present supplier. The buying loops are unexpectedly simple and routinized when technically less complex products are bought.
Most loops are of a highly routinized and undramatic straight rebuy character.
When buying technically more complex products, the straight rebuy loop is more similar to the modified rebuy loop. Most buying loops are modified rebuy loops. New task occurs very seldom. A number of buyer roles are suggested to summarize the influence patterns. The executor executes the process, in straight rebuys often quite independently, as the buying is essentially a prolongation of the former buying loops.