SPI: volume, area and height answer different questionsIllustrative paste deposit. Real volume is measured from a 3D surface; nominal aperture volume is a planning reference, not a measured deposit.SPI: volume, area and height answer different questionsHeightFootprintSeparate measurementsVolume / nominal volumeArea / nominal areaHeight / nominal heightNominal: aperture area× local stencil thickness³Ô¹Ïtv · Engineering illustration · Not an inspection record