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Efficient shipping starts with better flow

Our makeover series continues with a look at how to improve shipping by maximizing flow elsewhere in the dc.

By Gary Forger, Editorial Director -- Modern Materials Handling, 8/1/2005

"To improve shipping, you can't just focus on that department," says Patrick Sedlak, vice president of consulting firm Sedlak (216-206-4718). He explains that the die is already cast for poor shipping efficiencies if shipments arrive in clumps. To beat that, there must be good flow throughout the facility.

In the inefficient layout on this page, picking to pallet jacks and carts creates the clumps that move from picking to the store consolidation area. Then pallet jacks simply move the clumps to staging and finally shipping. "There's no flow here. Worse yet, there are no the tools to improve flow and manage product," says Sedlak.

The layouts on the following pages detail how these clumps can be eliminated in three different ways. The underlying premise is to better plan the day and manage the flow of orders into shipping and then onto over-the-road trailers.

 

 

Shortcomings
Shortcomings

  • Manual handling of cartons is labor intensive and inefficient
  • Shipment staging area requires too much space
  • Too many docks and trailers required to accommodate shipments

 


Improvements
- For Minimal Changes for Lower-Volume Operations

Minimal Changes for Lower Volume Operations

  • Full case and broken case picks go directly onto conveyors
  • Reduced handling and labor
  • Increased efficiency and productivity

New picking efficiencies are gained by bringing in two, three-level pick modules, one for full cases and the other for broken cases. Conveyors move full cases and totes of picked items to shipping and packing, creating much better flow than lift trucks did.

A sorter helps with flow still further by moving items to their next destinations in a measured manner. A pop-up wheel sorter automatically diverts cases and totes to a consolidation, pool point or parcel lane. Store consolidation items are palletized by store. Pool point items are palletized to a pool point. Parcel lane items are manifested and loaded onto a parcel truck. All shipments are staged prior to shipping. An improved information system coordinates the movement of cases and totes.

 

Improvements
- For Nominal Changes for Mid-Volume Operations

Nominal Changes for Mid-Volume Operations

  • Higher shipping volume capabilities
  • Decreased trailer loading times for pool point shipments
  • Higher dock door utilization

This alternative takes flow one step further. Staging is minimized and replaced by fluid loading in some areas. With the reduction of staging, the shipping sorter becomes even more critical to pacing the flow of items to the shipping department. For fluid loading, the sorter diverts items down extendible conveyors that load over-the-road trailers.

At the same time, goods are sorted in waves, creating a controlled flow to staging and fluid loading. Without this sorter, clumps here would have been difficult to minimize or eliminate. To further help with flow, a recirculation line prevents cartons from backing up the sorter lanes and shutting down the system during high-volume spikes. On the parcel line, conveyor sort fingers facilitate carton bundling.

 

Improvements
- Radical Changes for High-Volume Operations

Radical Changes for High-Volume Operations

  • Higher shipping volumes
  • Better space utilization
  • Faster turnaround to stores

For high-volume operations, the extreme make-over approach is best. And once again, sorters are key to improving flow.

Here, a mezzanine with secondary sorter expedites parcel bundling. By automatically sorting cartons to bundling locations, this approach takes flow to another level beyond the conveyor sort fingers used in the previous scenario. Payback for this additional sortation step is generally less than a year due to the heightened flow of outbound parcels.

Another improvement is the addition of crossdocking capabilities. Pre-allocated cartons are received on an extendible conveyor, creating fluid unloading. They are then inducted directly onto the shipping sorter, and diverted to the correct shipping lane and loaded immediately on an outbound trailer.


Click on MMH 
Click on the icon for other Materials Handling Makeover stories.
(Orderpicking gets a face lift - May 2005)

Click on MMH 
Click on the icon for other Materials Handling Makeover stories.
(The path to better receiving - February 2005)

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