Proceedings of the 21st ISPE Inc International Conference on Concurrent Engineering September 811 2. The theory of concurrent engineering is based on the concept that the different phases of a product lifecycle should be conducted concurrently and initiated as early as possible within the product creation process. Concurrent engineering is important in many industries, including automotive, aerospace, shipbuilding, consumer goods and environmental engineering, as well as in the development of new services and service support.This book presents the proceedings of the 21st ISPE Inc. International Conference on Concurrent