Working with global partners, researchers at NREL completed 5 years of work toward establishing international quality standard for manufacturing photovoltaic (PV) modules. Supplementing existing ISO-9001 and jointly developed by IEC and International PV Quality Assurance Task Force (PVQAT), new standard appears in "Terrestrial Photovoltaic (PV) Modules - Guidelines for increased confidence in PV module design qualification and type approval."