Pick and Pack: Goods-to-Person (G2P) and Cobot Integration

Pick-and-Pack (P&P) is the highest labor cost in a fulfillment center. Modern automation aims to reduce the "travel time" of workers by moving the inventory to the human, or by deploying robots that work alongside humans.

1. Goods-to-Person (G2P) vs. Person-to-Goods (P2G)

Person-to-Goods (P2G)

The traditional method where a worker walks with a cart to a static rack.

Inefficiency: 60-70% of a worker's shift is spent walking, not picking.
Automation Shift: AMRs (Autonomous Mobile Robots) act as "lead-follow" carts, reducing the worker's fatigue but not eliminating the walking.

Goods-to-Person (G2P)

The inventory comes to the worker's station.

Example: AutoStore or AMR Shelves. A robot retrieves a bin or an entire shelf and delivers it to a fixed "Pick Station."
Benefit: Worker productivity increases from 60-80 lines per hour (P2G) to 300-600 lines per hour (G2P).

2. Cobot Integration in Packing and Kitting

Collaborative Robots (Cobots) are designed to work safely in the same physical space as humans without safety cages.

Usage in Fulfillment

Kitting: A cobot picks small, repetitive items (e.g., screws, stickers) while a human handles the complex, variable item in a gift set.
Case Packing: Cobots handle the repetitive motion of loading boxes onto pallets (Palletizing), reducing repetitive strain injuries (RSI) for humans.
Vision-Assisted Picking: Cobots equipped with 3D cameras can identify "bin-stock" and orient items correctly for the packer.

Concrete Example: AMR-Assisted Zone Picking

In a large apparel warehouse:

The System: 50 AMRs (like Locus or 6 River Systems) roam the zones.
The Workflow: A human stays in a 2-aisle zone. An AMR arrives with a screen showing what to pick. The human picks, places it on the AMR, and hits "Confirm." The AMR then travels to the next zone or directly to the packing station.
Result: The human never leaves their zone, eliminating miles of walking per day.

3. Optimization Metrics for P&P

Metric	Definition	Manual Target	Automated Target
Units Per Hour (UPH)	Total items picked / hours	80	400+
Order Cycle Time	Time from order to "Ship Ready"	4 Hours	<30 Minutes
Mis-pick Rate	% of incorrect items	1.5%	<0.1%
Dwell Time	Time an item waits at a station	15 Mins	<2 Mins