The term 'Design LINCHPIN' refers to a person who is responsible for the overall design of a project. The term is derived from the word 'LINCHPIN, ' which is a pin or bolt that holds two or more parts of a machine together. In this case, the Design LINCHPIN is the person who holds the entire design process together. The MOTIF in this context is the overall theme or concept that the Design LINCHPIN is responsible for creating and maintaining throughout the project.