A system, method, and computer program for editing a production schedule. Further, an air press configured for carrying the semipermeable membrane therethrough is provided, and the air press has pressurized air therein. The piezoelectric material portion has a measurement surface extending in a direction that crosses a direction of the residual polarization of the piezoelectric ceramic, and, after the measurement surface has been polished to have a surface roughness of 200 nm or less, the measurement surface has a X-ray diffraction intensity ratio of 1. The system further comprises a seal substantially disposed across the cavity.