Chapter 4 of Circular 2 provides guidance on the application of each of the five specified methods. Circular 2 does not stipulate any hierarchy or preference in methods used by tax authorities during a transfer pricing audit assessment; instead, it endorses implicitly the selection of the most appropriate transfer pricing method. According to Article 22 of Circular 2, a comparability analysis should be carried out when selecting a transfer pricing method and the following five comparability factors should be taken into consideration: