Manufacture impacts are measured at components and device level with a bottom-up approach.
Manufacture impacts can be reported with several allocation strategies.
Hover the lifecycle -
The total manufacturing impacts are reported independently of the usage.
manufacture_impact = total_impact
Hover a specific duration -
The manufacturing impacts is linearly distributed hover the life duration of the devices. The impacts are reported hover the usage duration.
manufacture_impact = total_impact * (usage_duration/life_duration)
Variable components impacts
The impact of variable components are evaluated from the components characteristics.
Fixed components impacts
The impact of fixed component are set by default
Device impacts is evaluated from the sum of the impacts of its components. Other treatments can be applied depending on the device.