Steps To List Functional Testcases

I The derivation of Functional test cases and the mapping between them & the usecases
Needs -> Features -> Usecases/Support Specs -> Scenarios -> Testcases
II The use case mostly will list/have the following details
Brief description
Flow of events
Basic flow
Alternative flow 1
Alternative flow 2
Special requirements
Preconditions
Post-conditions
Extension points
Context diagram
Activity diagram