DFMA, stands for Design For Manufacture and Assembly. It´s the combination of 2 methodologies: Design for Manufacture, which means the design for ease of manufacture of the parts that will form a product, and a design for assembly, which means the design of the product for ease of assembly.
It provides guidance to the design team in simplifying the product structure, to reduce manufacturing and assembly cost, and to quantify improvements. The practice of applying DFMA is to identify, quantify and eliminate waste or inefficiency in a product design. DFMA in therefore a component of Lean Manufacturing.
Also, DFMA is the name of the integrated set of software products from Boothroyd Dewhurst, Inc. that are used by companies to implement the DFMA methodology. DFMA is a registered trademark of Boothroyd Dewhurst, Inc.