Abstract: A method for manufacturing a composite component from a plurality of plies of fibres embedded in a resin includes the following steps: forming a preliminary composite component by draping the plurality of fibre plies in a mould; laying up the preliminary composite component by stacking layers comprising at least one airtight film, a drainage fabric and a cover sheet; polymerizing the preliminary composite component arranged on a table of an enclosure of an apparatus of the autoclave type, equipped with a device for measuring the temperature T inside the enclosure, by applying a temperature cycle and a pressure cycle; demoulding a raw composite component; testing the dimensions and defect rate of the raw component, wherein the polymerization step includes the application of a pressure P in the enclosure as soon as the temperature T in the enclosure is greater than or equal to a threshold temperature Ts.