Final answer:
Decrypting is not a part of the external environmental analysis process, which instead includes Scanning, Monitoring, and Assessing.
Step-by-step explanation:
The activity that is NOT used in the external environmental analysis process is Decrypting. This process usually involves Scanning, which means looking for important information, Monitoring, which refers to tracking environmental trends, changes, and patterns, and Assessing, where the significance of the changes for the organization's strategic position is evaluated. Decrypting, on the other hand, is related to the process of converting encoded or encrypted data into a readable format, which does not fit within the context of external environmental analysis.