The researchers of the Lean Aircraft Initiative developed a hypothesized lean
implementation model seeking to provide its members guidance on implementing lean
transitions in factory operations of low volume/high complexity production systems. The model
features four phases: (1) building a lean infrastructure to support lean behavior, (2)
redesigning the flow of products in the factory, (3) revamping the operations management and
(4) fostering process improvement. An order of implementation is discussed and each phase
has implementation steps as well. Following the development of the hypothesized lean
implementation model, twelve case studies were used to test the model. This report details the
model and analyzes the case studies using the model as a framework
