Performing a walkthrough is an efficient way of:
1. understanding the flow of transactions in the entity, including how the transactions are initiated, authorized, processed, and recorded.
2. verifying that the auditor has identified the points within the entity's processes at which a material misstatement could arise (including misstatements due to fraud).
3. identifying the controls that management has implemented to address potential misstatements.
4. identifying the controls that management has implemented to prevent or timely detect unauthorized acquisition, use, or disposition of company assets that could result in a material misstatement of the financial statements.
Does #2 make sense? How can walkthrough verify the fact the auditor identified something?