The difference between NPI, SDD, and CM is subtle. NPI is how something is launched for the first time. It is the non-technical coordinating function for all related processes, many of which are technical. SDD is the technical process of deploying new instances of an existing item, whether it is a machine, a server, or a service. It may include non-technical processes such as budget approval, but these are in support of the technical goal. CM is how upgrades and changes are managed, either using a software deployment platform or an enterprise-style change management review board.
