4.2. Synthesis of sensitivity results from the various Eco-Factors
A sensitivity analysis on LCA of biofuels cases involving the use of different TEFs was conducted in order to identify and focus on key data and assumptions that have the most influence on the re- sults or uncertainty of the developed method. This study is on the effect of varying the parameters establishing the TEFs and consid- ering the effect on the results in terms of benefit of biofuels over their fossil fuel counterparts. The fuel LCI remains the same as the base case, but the TEFs will be derived corresponding to target development and implementation. The policy-based scenarios consist of 1) strong policy setting: based on possible targets of each environmental aspects that originate from internal political will or international pressures and 2) weak policy setting: induced by disregarding and no serious action on environmental problems related to future threats.
The list of changed parameters for each scenario compared with the base case is shown in Table 4 and description of scenario as- sumptions is shown below.
Scenario 1: Strong policy setting.