Pherical tracking on workstations

[Stingfish]

Im trying to design a tracking DB for phericals and ports located at workstations throughout the office. Theres over 200 workstations.

Ok this is what I have so far. Please tell me if im on the right track and any suggestions.

Ive never been good at doing the relationships. They are so frustrating at times.

 

[aleb]

Not sure but:
Parent (P)
Child (C)

"Subsection" is P to "CostCenter" C
"CostCenter" is P to "Employee" C
"Employee" is P to "Workstation" C
"Workstation" is P to "Equipmentuse" C
"Equipment" is P to "Equipmentuse" C

Cost Center number is already a unigue number no need for Autonumber.
Pass number a unique field no need for Stafffid