A method of manufacturing an article, comprising: (a) forming an article in an initial state via an additive manufacturing process , the article comprising first mounting features ; and (b) performing a second manufacturing process to transform the article into a second state, which second manufacturing process comprises: (i) mounting , via the first mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , (ii) with the article so mounted in the holding device of the machine via the first mounting features : processing at least one first feature on the article , and processing second mounting features on the article , with the position of the second mounting features being constrained in a known manner with respect to the at least one first feature , characterised in (iii) removing the article from the holding device of the machine, (iv) re-mounting the article via the second mounting features formed during step (ii), and then (v) with the article so mounted via the second mounting features , processing at least one second feature on the article , with the position of the at least one second feature being controlled with respect to the at least one first feature using knowledge of the position of the second mounting features with respect to the at least one first feature . (a) forming an article in an initial state via an additive manufacturing process , the article comprising first mounting features ; and (b) performing a second manufacturing process to transform the article into a second state, which second manufacturing process comprises: (i) mounting , via the first mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , (ii) with the article so mounted in the holding device of the machine via the first mounting features : processing at least one first feature on the article , and processing second mounting features on the article , with the position of the second mounting features being constrained in a known manner with respect to the at least one first feature , characterised in (iii) removing the article from the holding device of the machine, (iv) re-mounting the article via the second mounting features formed during step (ii), and then (v) with the article so mounted via the second mounting features , processing at least one second feature on the article , with the position of the at least one second feature being controlled with respect to the at least one first feature using knowledge of the position of the second mounting features with respect to the at least one first feature . (i) mounting , via the first mounting features formed during the additive manufacturing process, the article in a holding device of a machine for operating on the article , (ii) with the article so mounted in the holding device of the machine via the first mounting features : processing at least one first feature on the article , and processing second mounting features on the article , with the position of the second mounting features being constrained in a known manner with respect to the at least one first feature , characterised in (iii) removing the article from the holding device of the machine, (iv) re-mounting the article via the second mounting features formed during step (ii), and then (v) with the article so mounted via the second mounting features , processing at least one second feature on the article , with the position of the at least one second feature being controlled with respect to the at least one first feature using knowledge of the position of the second mounting features with respect to the at least one first feature . <EOS>