How does one conduct an inter-industry and intra-industry analysis in accounting? What steps are taken and need to be followed?

For Inter-industry, we are asked to identify and provide an analysis of accounting measurement problems at the level of the industry. We would need to identify what's special about that industry that was chosen.

For Intra-industry (or intercompany) we are asked to identify accounting policy choices by 2 selected public corporations. What else goes into conducting an intercompany/interindustry analysis?