Analysis Methodology

Analysis methodology:

DFE consist of a systematic way of product design investigation and graphical presentation of results. The investigation includes specific information about whole product, disassembly sequence, disassembly difficulties and environmental questions. The graphical result shows the relation between financial, environment and disassembly time with respect to removal of different parts. This analysis methodology enable non eco-expert designer to develop eco-friendly and profitable design. Designers simply need to follow the systematic data input using their design concepts. Graphical results will be generated. The graphical representation of result is very clear and enable designers to view the ‘what if’ situation. Designers need only change disassembly order, materials or auto-optimization guided by software to generate more profitable design with less environmental impact. Designer can also analyze their design by comparing with alternative design’s graphical results.

However, there are defaults for the DFE software since the analysis is based on a lot of assumptions. Many data are preset by MET94 database, for example, bar of steel is indicated to contain an average of 18% recycled steel. These assumptions may not agree with the real situation. Designer must accept these defaults when using the software.

Appropriateness for product redesign:

DFE allow designer conduct profitability and environmental assessment during the concept stage of design using systematic analysis methodology. Design can change their design concepts easily before going to further stages. Moreover, the red vertical bars in the graphical result shows the negative production effects of materials and manufacturing processes. Large bars indicate a greater priority or potential for improvement of the part on weight reduction or recycling. Designers can focus on these parts since there are