More to consider in task analysis
Chose a scenario which frequently happen, time critical, user errors significant (dangerous, expensive, often)
Enrich the task model by asking:
what happens if :
- some input info. is missing or incorrect?
- Someone else has borrowed the folder?
- Interruption from other urgent task?
- the users make an error?
Subdivide task properly in details (logical action level, not on computer system)