Table 2 Incremental cost and waiting time of reengineered billing systems
(O) Origin | (R) Reengineering | Incremental cost | Waiting time |
|---|---|---|---|
OPD Volume × unit cost of cash billing | Volume cash billing × unit cost of cash billing + volume smartcard billing × unit cost of smartcard billing – clerk compensation saving | (R) − (O) | Original cash billing waiting time × clerk loading |