In June 2004, the International Organization for Standardization (ISO) announced yield testing and reporting standards for Monochrome Xerographic Engines under ISO/IEC 19752. In December 2006, yield testing and reporting standards for Color Xerographic Engines were also announced under ISO/IEC 19798 and ISO/IEC 24711. These standards ensure that toner or ink yield reporting by different manufacturers will adhere to the same rigorous testing process, making yields comparable across different products.