Best practice report: Green Supply Chain Management

July 18, 2014 by BPIR.com Limited

Measures

The following table outlines some basic areas in which the performance of Green Supply Chains can be measured and evaluated. [17]

 


N.B.: Carbon Footprint Analysis

A Carbon Footprint is the amount of greenhouse gas generated by activities; this is commonly expressed in kilograms or tonnes. There are a number of recognised greenhouse gases, including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulphur hexafluoride (SF6). In order to allow simple comparisons to be made, “CO2 equivalent” (CO2e) measures are used.

Raw Materials

Energy consumption is a significant source of CO2e, as demonstrated by the calculation below associated with sourcing raw materials for manufacture:

E = ((B/A) x C x D) / 1000 = Total CO2e emissions (tonnes)
Where:     A = total output (units per year)
B = electricity consumption (kw/year)
C = quantity purchased (units/year)
D = CO2e emission factor (kg/kwh).

The following is an example calculation for raw materials:

 

 


Emission from Inbound Logistics: The following formula may be used to calculate emissions associated with inbound logistics activities:

D = (A x B x C) / 1000 = Total CO2e emissions in tonnes
Where:      A = total weight (tonnes)
B = Distance travelled
C = CO2e emission factor gCO2/ tonne – km).

The following is an example calculation for inbound logistics:

 

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