An operation method of a recipe control process in which multiple processing targets are processed continuously in a processing apparatus using recipes that specify a set of control parameters specifying the processing conditions of processing targets. The system includes a drop table that stores drop probabilities. At least one projection extends from the shaft forward end adjacent the shaft upper surface to prevent improper clamping of the shaft forward end and any associated feeling of proper interconnection. The output voltage of the modulator applying either after the optional output filter or the output stage is fed back through the function block so as to generate the signal fed back. The order may be represented as an order object, which represents the order and can be related to particular shipping methods and payment mechanisms. A tightening mechanism is mounted onto the first shell, and has a ratchet strap located along the rear surface of the first shell and a ratchet device mounted on the front surface of the first shell.