Definitions

DoD
Integrated Product and Process Development: A management tecnique that simultaneously integrates all essential acquisition activities through the use of multidisciplinary teams to optimize the design, manufacturing and supportability processes. IPPD facilitates meeting cost and performance objectives from product concept through production, including field support. One of the key IPPD tenets is multidisciplinary teamwork through Integrated Product Teams (IPTs).

Source: DoD Integrated Product and Process Development Handbook, August 1998.

FAA
Integrated Teaming: The purpose of Integrated Teaming is to identify and maintain the disciplines and stakeholders necessary to effectively accomplish appropriate multidisciplinary/cross-functional missions, to create integrated teams as apropriate, and to establish and maintain a supportive teaming environment.

Source: FAA-iCMM, V2.

IRS
Integrated Product Team (IPT): An IPT is a multi-disciplined, cross-functional team brought together to implement the processes necessary to deliver a defined product or set of products.

Source: ELC Guide, Volume 2, Version 1.