Hi Calum,

I would recommend that you use the analysis tool to scrutinize your data. This way, you will be able to see the total impact for each module. To analyze the impact of the material, perhaps adding 1 unit (ton, kg, or m3, etc.) of the specific material could help obtain the total impact in modules A1-A3 (product stage).

Please refer to this support post for more information about Hotspot Analysis in eTool