The ACM0001 methodology requires the use of the "Tool for the demonstration and assessment of additionality" to demonstrate and assess additionality, which is a step-wise approach that includes:
- Identification of alternatives to the project activity;
- Investment analysis to determine that the proposed project activity is not the most economically or financially attractive alternative (in the absence of the JI incentive);
- Barriers analysis;
- Common practice analysis and
- Impact of registration of the proposed project activity as a JI project activity.
The "Tool for the demonstration and assessment of additionality (version 2)" (UNFCCC, 28 November 2005) is applied as follows.

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