- Comparison between a new product and a baseline product (in principle, we use Mitsubishi Electric products and a base year of 2000).
- Evaluations of the performance factor (improvement in product performance) and the environmental impact factor (degree of environmental impact reduction) are multiplied together to produce the rating.
- The performance assessment index is evaluated as follows: [Basic functions (product functions, performance, quality, etc.) × product life]. Environmental impact is based on MET, and includes these three indices: (1) volume of non-recycled resources used*1, (2) lifecycle CO2 emission*2, and (3) substances with potential environmental risk. With the index of the baseline product being one, the environmental impact of the evaluated product is calculated, and integrated into the vector sum.
- *1 Index for volume of non-recycled resources used = virgin resource consumption + non-recyclable volume (i.e., volume disposed of without being recycled) = [weight of product - volume of recycled materials and parts] + [weight of product - recyclable volume]
- *2 CO2 emissions calculated from the point of the procurement of the product to its disposal (previously the amount of energy used in production only).