The term ‘audit procedure’ refers to both ToC and substantive tests. When attending and observing an inventory count the tests would be a mix. For example:
Inspect shelves to ensure they are uniquely numbered (ToC)
Inspect the register of stock sheets issued and returned to ensure these are all accounted for (ToC)
Perform test counts (Substantive)
After the stocktake, reperform the additions on the evaluated stock sheets (Substantive)