The aim of the present Desk paper is to synthesise the main econometric methods (including the mathematical and statistical ones) used in the Romanian Quarterly National Accounts compilation, irrespectively of Quarterly Gross Domestic Product (QGDP).These methods are adapted for a fast manner to operatively provide information about the country macroeconomic evolution to interested users.In this context, the mathematical and econometric methods play an important role in obtaining quarterly accounts valued in current prices and in constant prices, Baby in seasonal adjustments and flash estimates of QGDP.