I recommend we start with the OECD metrics (similarly like how we use the Sustainable Development Goal class for sustainable development goals.
We need to classify them by the 3 sub-attributes identified:
Here are the OECD metrtics:
I1. Non-renewable materials intensity - note: link to Source processes
I2. Restricted substances intensity - note: link to Source processes
I3. Recycled/reused content - note: link to Source processes
O1. Water intensity - note: link to Source/Make processes
O2. Energy intensity - note: link to Source/Make/Deliver processes
O3. Renewable proportion of energy - note: link to Source/Make/Deliver processes
O4. Greenhouse gas intensity - note: link to Source/Make/Deliver processes
O5. Residuals intensity - note: link to Make processes
O6. Air releases intensity - note: link to Make processes
O7. Water releases intensity - note: link to Make processes
O8. Proportion of natural land - note: link to Make processes
P1. Recycled/reused content - note: link to Source processes
P2. Recyclability - note: link to? This is whether the product can be recycled later
P3. Renewable materials content - note: link to Source processes
P4. Non-renewable materials intensity - note: link to Source processes
P5. Restricted substances content - note: link to Source processes
P6. Energy consumption intensity - note: link to Source/Make/Deliver processes
P7. Greenhouse gas emissions intensity - note: link to Source/Make/Deliver processes