When designing the material handling layout/system, remember that the majority of your Internet orders are picked complete from one product location. There is no need to travel through multiple pick zones to complete Internet orders. The quicker the order is passed through the picking process to shipping, the faster it is delivered to the consumer.
Technology integrated with the picking storage and handling equipment usually increases the picking throughput. Effective picking technologies include radio frequency (RF) terminals, voice recognition technology, and pick/put-to-light systems.
- In an RF terminal system, the location and quantity for each product is displayed on the terminal screen. Wrist mounted RF terminals are available to provide a more efficient RF picking operation.
- In a voice recognition system, terminals convert electronic text into voice commands that guide the operator during picking. A headset is worn to send and receive commands and the terminal receiver is worn around the operator’s waist.
- In a pick/put-to-light system, bay and location displays are illuminated to guide the operator through the picking process. Location buttons are depressed to confirm the completion of tasks. Advanced pick/put to-light systems exist that don’t require the operator to depress location buttons during picking. These advanced pick/put to light systems have sensors that detect the operator’s arm movement when the pick face opening is crossed.
Comparing qualitative issues (see chart below) among these technologies will most likely show that a pick/put to light system provides the best solution, with the least risk. However, depending on the weight or importance of each criteria and your specific application, each of these technologies provides a viable solution for e-commerce picking operations.
Criteria |
Pick/Put
to Light |
RF
Terminals |
Voice
Recognition |
Accuracy |
A |
A |
B |
Reliability |
B |
C |
B |
Ease of use |
A |
C |
B |
Proven Technology |
A |
A |
A |
Flexibility |
B |
B |
B |
Expandability (SKU) |
C |
A |
A |
Expandability (activity) |
A |
C |
C |
Equipment Maintenance |
B |
C |
B |
Software Maintenance |
A |
B |
B |
Ease of implementation |
A |
B |
B |
Total Score |
A- |
C+ |
B+ |
Key: A – best to C - worse
Financially, there are trade-offs between technologies. A pick/put to light system has a high initial investment cost, but lower annual labor costs. An RF terminal system has a medium to low initial investment cost, but higher annual labor costs. And, voice system investment and labor costs rank somewhere in the middle.
The investment cost for a pick/put to light system is impacted more by an increase in the number of locations (or products), rather than an increase in order activity. Conversely, RF terminal and voice systems are impacted by an increase in order activity.
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