c)  The hardware design department now assures that the reference schematics for every peripheral used are available. If any reference schematic is missing, the corresponding peripheral has to be replaced by a new one – the process starts over with the activity where peripherals are added.  If all reference schematics are available, the hardware design department customizes them, which triggers the creation of a schematic symbol library. Then the materials management department searches for components in every supplier database. Once all components have been found, both the materials management and the hardware design department together gather all components information. Then, in parallel, the materials management department updates the description, the manufacturer information, the product numbers and the supplier’s information. As a result, a preliminary schematic is available.