Aspects of the present invention disclose a system, method and program product for determining the affects of management actions. The more linear slope on the output of the push-pull buffer may improve the linearity of a phase interpolator using the clock signals output from the push-pull buffers. Then, the holding members, bag bottom receiving stand and suction plates are raised, and bags are fitted over the spouts and raised to the upper end of the sealing portion of the spouts. The first insulating layer, the controlling electrode layer, and the second insulating layer are sequentially formed on the first area.