Final answer:
Option (c) 'Perform appropriate follow-up on all material and immaterial differences' is not a step in the process of using analytical procedures, as immaterial differences typically do not warrant follow-up.
Step-by-step explanation:
The question relates to the steps in the process of using analytical procedures during an audit. Among the options given, the activity that is not a step in the process for using analytical procedures is:
- c. Perform appropriate follow-up on all material and immaterial differences.
Analytical procedures typically include:
- Defining the significance threshold (option a).
- Computing differences between the auditor's expectations and the client's balance (option b).
- Developing an expectation based on relevant data (option d).
Follow-ups are generally conducted on material differences rather than immaterial ones, as immaterial differences are not expected to impact the overall financial statements significantly.