A method of manufacturing an article comprising: (a) performing an additive manufacturing process to form an article in an initial state, the article comprising mounting features and the additive manufacturing process comprising forming the article, including the mounting features , additively from a material according to a computer model of the article , such that data concerning the position of a predetermined feature on the article , relative to the mounting features , is derivable from the computer model; and (b) performing a second manufacturing process to transform the article into a second state, which second manufacturing process comprises: (i) mounting , via the mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , and (ii) with the article so mounted in and held by the holding device to define and maintain its location during the second manufacturing process, processing at least one feature on the article ; characterised in that the mounting features are kinematic mounting features which engage in the mounting step (i) with corresponding kinematic mounting features on the holding device of the machine, wherein in the processing step (ii) the position and orientation of the article in three linear and three rotational degrees of freedom within the machine operating volume is known and defined (A) by placing the article on the holding device for the mounting step (i) in a known gross orientation and (B) by virtue of the interaction of the kinematic mounting features of the article with those of the holding device , and wherein the location of the predetermined feature is determined in the processing step (ii) using data derived from the computer model concerning the position of the predetermined feature relative to the kinematic mounting features of the article . (a) performing an additive manufacturing process to form an article in an initial state, the article comprising mounting features and the additive manufacturing process comprising forming the article, including the mounting features , additively from a material according to a computer model of the article , such that data concerning the position of a predetermined feature on the article , relative to the mounting features , is derivable from the computer model; and (b) performing a second manufacturing process to transform the article into a second state, which second manufacturing process comprises: (i) mounting , via the mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , and (ii) with the article so mounted in and held by the holding device to define and maintain its location during the second manufacturing process, processing at least one feature on the article ; (i) mounting , via the mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , and (ii) with the article so mounted in and held by the holding device to define and maintain its location during the second manufacturing process, processing at least one feature on the article ; <EOS>