1. A method for identifying dependencies between components for a given build of a componentised product, the method comprising the steps of: selecting a set of components for assembly into a componentised product, said set comprising one or more existing components and one or more new components; identifying combinations of said selected set of components providing said componentised product where each said combination of components comprises at least one of said new components; testing each of said combinations of components and identifying each combination of components that passes or fails said testing; selecting a first new component and determining whether a combination including the first new component as the only new component has passed the testing; responsive to a determination that the combination including the first new component as the only new component has failed the testing, identifying any other of said combinations of said components identified as passing said testing and comprising said first new component and a second new component; and for any identified other of said combinations of said components comprising said first and second new components, identifying said first new component as being dependent on said second new component.