In this study, RFID is integrated with lean production to improve
warehouse operations. RFID systems are installed in eight
CDC warehouses and 10 LDC warehouses and simulation of operations
with RFID system is investigated. Table 2 illustrates the
improvement of total supply chain operation time of three scenarios
(i.e., as-is, to-be with lean and RFID, to-be with lean, RFID, and
cross-docking), from the viewpoint of value-added as well as waiting
and transportation time. The value-added time of CDC and LDC
processes consists of receiving, storage, picking and sorting, packaging,
shipping, and cross-docking, as shown in Figs. 2 and 4.
After the reengineering using lean production, the waiting and
transportation time can be reduced from 1200 to 146 h and from
120 to 98 h (with improvement of 88% and 18%, respectively) from
as-is scenario to to-be scenario with lean and RFID in CDC and LDC,
respectively. Further improvement can be achieved to 72.6 and
72.5 h (with improvement of 94% and 40%, compared to as-is scenario)
in the to-be scenario with lean, RFID, and cross-docking in
CDC and LDC, respectively. The final waiting and transportation
time is only 6% and 60% of the original version