Indexing User Tasks
http://www.allegrotechindexing.com/news013.htm

Brown, Fred
Allegro Time!
2001

Abstract:

Because user tasks form the foundation of modern 'task-based' documentation, tasks should be well-represented in the index. We need to create index headings for both the broad objectives of the user (e.g., balancing a cheque book), and the specific actions required by the application (e.g., opening a file).