1. An integrated product network manager (PNM) system configured for linking at least one requirements trees to database elements, comprising: at least one server having memory and a processor; at least one database capable of exchanging data with the servers, at least one network communicating with the at least one server and capable of allowing the at least one server to exchange data with other servers and with remote computers connected to the networks; product lifecycle management software stored in memory and capable of running on the at least one server; requirements management software stored in memory in the at least one servers and capable of producing requirements trees when executed by a processor; and product network management software stored in memory and executable by a processor to enable the linking of the requirements trees produced by the requirements management software to at least some of the database elements.