what are the points to be emphasized in testing of a system which has multiple workstations for inputting (as against a single workstation system)?

a) Seduconcurrancy testing :- When one user or console is updating /adding /deleting a record other user should not be allowed to process the same record - Other user should be in wait state
b) Load test / stress test should be done
c) Recovery test should be done
d) Performance testing: - Response time/Transaction completion time
e) Data validation: - Check if data is saved in correct order, data retrieval is correct
f) Access control
g) Database security
h) Concurrent user test
i) Update and Rollback
j) Response time and Server connectivity