|
|
 |
Why Automation Is the Next Generation
in Effective Warehouse Management
External competition as well as increased internal pressures to be lean, increase productivity
and improve the bottom line has caused many companies to reevaluate their
warehouse operations. Employing the strategies of yesterday does not translate into
positive results for tomorrow. If you want to improve efficiency and reduce costs,
automation is the answer.
BY MIKE URBAN |
Increasing numbers of companies with the
insight and resources are fully automating
their warehouse operations. By embracing
technology, those companies are beginning
to reap measurable benefits in terms of
reduced operating costs and increased productivity.
By taking the core functions of a
warehouse operation and automating them,
the warehouse, as a whole, has transformed.
For all intents and purposes, warehouses have
become – smarter.
EVOLUTION OF A CONCEPT
The term “smart warehouse” has been
tossed around for the past few years and has
been used to represent everything from the
use of RFID tags and software to quality
assurance. But a true Smart Warehouse is
more than a buzzword or manufacturing jargon.
When implemented effectively, it is a
systematic strategy that can take a traditional
operation to the next level.
A Smart Warehouse implies the total integration
of automated technology to carry out
day-to-day operations. The components of a
Smart Warehouse include the utilization of
conveyor systems, Automatic Guided Vehicles
(AGVs), Automatic Trailer Loading (ATL)
vehicles, Automated Guided Carts (AGCs),
Automated Storage and Retrieval Systems
(AS/RS), or a warehouse management system.
When used in a concerted effort, these ingredients
make for a highly productive warehouse.
In North America, a typical warehouse
operation possesses the following characteristics:
it is normally privately run; is less than
250,000 sq. ft. in size; end consumers or
another manufacturer are its primary customers;
and its most common units handled
are pallets with rack storage serving as the
primary housing method. According to the
First Annual Warehouses Trend Survey conducted
by RBI Research, Gross & Associates in
2006, warehouse managers indicated that
their chief goals and concerns centred on
increasing customer satisfaction, which
included delivery of on-time, undamaged and
accurate orders, and reduction of costs.
MEASURABLE BENEFITS
A company taking the necessary steps to
invest in and develop its warehouse and distribution
centres’ infrastructures now, ultimately
saves money later. A Smart Warehouse
operation will help a warehouse manager
address the goals of improving customer satisfaction
and reducing operating costs. Smart
Warehouses adhere to the basic principles of
“lean” warehousing while creating a safer
work environment by cutting down on the
probability of human error.
Smart Warehouses allow a company not
only to achieve its desired results, but to add
reliability, dependability and, more importantly,
predictability to the process. The Smart
Warehouse then allows for a “lights out” 24/7
operation if necessary. Companies that used
to depend on manpower can reassign key personnel
to other areas where needed.
For more than a decade, materials handling
providers have been developing new
technology and systems to automate timeconsuming
and costly operations typically
requiring manpower. As a global leader in the
materials handling industry, the Jervis B.
Webb Company has invested the necessary
resources to produce all the components for a
fully functional Smart Warehouse system.
Additionally, Webb provides the blueprint for
making those pieces work in an integrated
and seamless operation.
SMART TECHNOLOGY
SmartCart® AGCs
The SmartCart AGC is an extremely lowcost,
magnetic tape-guided AGV that can
transport finished pallets from stretch wrapping
operations to AS/RS, rack staging or a
floor staging area adjacent to the docks.
The SmartCart typically costs much less
than a conventional AGV and can be utilized
as an alternative to performing similar work.
It is extremely flexible because all that is
needed to change the path is relocating the
tape that is attached to the surface of the warehouse floor and modifying an easy-touse
Windows-based software called
SmartTools®, which allows the customer to program the guide path.
Furthermore, a SmartCart is perfect for transporting materials from production to the warehouse. It has the ability to deliver pallets onto a powered or gravity buffer conveyor. Once handed off, the pallet may then be taken into high-rise storage, or AS/RS to rack storage, or to the dock for trailer loading.
SMARTLOADER® AUTOMATIC TRAILER LOADING (ATL) VEHICLE
SmartLoader ATL is able to stack pallets accurately and efficiently. In fact, the unmanned SmartLoader, which is directed by a Vehicle System Manager, demonstrates a higher degree of accuracy than traditional forklift operations.
Deep lane storage of finished goods on pallets placed by SmartLoader is recognizably one of the most effective warehouse solutions. Because of SmartLoader's flexibility, it does not depend on fixed, rail-guided AS/RS machines that are limited to a single aisle.
|

The SmartLoader is a free-ranging machine that uses either inertial or laser guidance to travel within a warehouse.
Additionally, SmartLoader is capable of
delivering finished pallets directly into conventional,
over-the-road trailers. Even more
remarkable, SmartLoader does not require
any modifications to the trailers or dock
plates and can adapt to trailer skew. This
makes the ATL possibly the most powerful
tool ever created for the warehouse. Because
of its unique combination of stacking and
loading skills, it is gaining wide attention
among companies looking to improve their
productivity and efficiency.
Warehouse Management Systems (WMS)
software can be integrated with the
SmartLoader Vehicle System Manager. Both
the SmartCart and the SmartLoader systems
are easy to install and allow for additional
vehicles to be added as demand increases.
Both automated vehicles can operate separately
or as companions to one another.
CONVEYORS
Conveyors are at the heart of thousands
of manufacturing, warehousing and distribution
operations, providing unmatched reliability
in the most demanding environments.
They are used for point-to-point movement
of pallets and containers.
Offerings such as the gravity roller conveyor
are widely used in unit load handling
systems because of their simplicity, low unit
cost and ease of maintenance. Gravity roller
conveyors can be applied in the form of level
push-lines or graded lines using the force of
gravity.
The modular-designed pallet accumulation
conveyor consists of separate powered
zones of chain-driven live roller conveyor
powered through a mechanical clutch. This
allows zero pressure accumulation of heavy,
bulky, unitized loads.
The use of individual zones permits loads
to advance to the farthest downstream empty
zone. The clutch-controlled zone allows the
individual release of the loads at the discharge
end and indexing forward of the
accumulated loads.
The pallet accumulator delivers no
impact and continuous transport of palletized
loads. Conveyor systems can be integrated
with SmartCart AGCs.
AUTOMATED STORAGE AND RETRIEVAL
SYSTEM (AS/RS)
AS/RS automatically deposits and
retrieves loads from defined storage locations.
AS/RS improves the efficiency of
transporting, buffering and sequencing of
standard and non-standard loads. It eliminates
the excessive and repetitive handling
of material, increases productivity, decreases
inventory, increases the productivity capacity
of existing floor space and reduces product
loss.
AS/RS systems can be built around rack
systems, containers and machines to optimize
warehouse space.
RACK SYSTEMS
If density is an issue, but not selectivity,
then a rack system may be the right choice.
Rack systems are more cost-effective and are
easier to reconfigure than AS/RS. Racks
allow higher stacking than floor storage and
provide increased storage.
Drive-in or drive-through rack systems
can be designed to allow two pallets to be
handled at a time by forklifts (cutting labour
in half) or SmartLoader ATLs (doubling system
throughput). This rack concept allows for
the most density for the dollar.
Another rack system is pallet flow, which
provides the maximum density and can also
be accessed by SmartLoader ATLs.
LOOKING AHEAD
As technology improves, new automated
products are being introduced, giving warehouse
managers more options than ever
before. Conducting the necessary research
and selecting the appropriate automation for
a company’s needs will ultimately result in
improved accuracy, speed and productivity.
With the advent of Smart Warehouses,
the future of warehouse operations looks
very promising.
_________________________________________
Michael Urban is a Business Development Specialist for the Jervis B. Webb Company’s Smart Handling Group.
|
| .................................................................................. |
Warehouse Robotics Can Deliver
Bottom Line Performance
Warehouse operators are finding it increasingly challenging to keep pace with their picking and distribution processes. In some industries, the number of SKUs and labour requirements are growing by leaps and bounds, which can also mean more margin for error, not to mention the dollars and time spent on expansion.
BY DEREK RICKARD |
Many are realizing that manual
processes are reaching their
limitations. By way of example,
let’s look at the picking process.
A manual pick module requires each picker to
work sequentially through their pick list,
stacking product on dedicated pick belts.
Traditionally, pick belts are configured twowide,
or sometimes stacked up to three-high.
When pick rates need to increase, operations
can’t add any belts to the existing configuration
since that would be unsafe for
workers. The only way to expand is to add an
entire new pick module, adding to the square
footage required.
Adding SKUs also presents a challenge as
more lanes have to be added, which reduces a
picker’s productivity by making the employee
walk further and pick less of each SKU.
Studies have shown that a picker working a
standard pick module consisting of 250 SKUs
already walks approximately 1.5 km per order
picked! (Often on multiple levels.)
Many warehousing and distribution centres
are hitting the point where they will be
forced to expand the building and add more
modules, or consider a solution like an automated
picking and distribution system. Doing
nothing is simply not going to be an option.
THE POWER OF ROBOTICS
An increasingly popular approach is
space-saving robotic gantry solutions. These
allow operators to boost warehouse productivity
and efficiency without having to add
modules or increase space usage. This is particularly
useful for operations that must deal
with high SKU counts and just-in-time delivery
demands.
A robotic gantry is a high-speed robot
mounted on rails above the warehouse floor.
Its design offers four axes of motion to create
a large rectangular work envelope
and can be configured to fit into a
variety of footprint shapes and sizes
for limitless layout options. The benefit
of this design is they work from
above and consume very little space of
their own.
This system has been used by a number
of warehousing operations worldwide.
Experience has shown that robotics can eliminate
100% of picking errors and dramatically
reduce product damage. Given that industry
order picking errors can be as high as 20%
and product damage around 2%, the savings
become clear. In addition, there are considerable
labour savings, which can account for
more than half of a warehouse facility’s operating
costs.
A car parts manufacturer we have worked with, for example, uses gantry robotics extensively to address its warehousing distribution needs. The company has installed more than 30 robots at different facilities to streamline delivery of products to customers while improving accuracy.
|
The newest installation featured 12
gantry robots working simultaneously to handle
every aspect of warehouse distribution
from receipt of goods to sequential loading
onto a trailer for customer delivery.
The system identifies each product,
remembers where it is stacked, and then sorts
and deploys it for direct shipping. To give an
indication of the accuracy levels and performance,
during initial testing the robotics
application processed 1.3 million parts with
no inventory discrepancies. The company also
has accurate information on every part, no
matter where it is in the delivery cycle, which
results in improved efficiency, order accuracy
and customer service.
PICKING FOR PROFIT
To illustrate how robotics can be used, the
following describes a robotic gantry in a typical
picking scenario:
1) Loading: The system is loaded by an operator
who delivers source pallets to a loading
station at a de-palletizer. Loads are conveyed
into an articulated arm work envelope.
2) Singulating: Loads are stripped a layer at a
time and placed on a descrambling conveyor
system that singulates and orients cases for
proper conveyance. Cases are guided to their
destinations in the gantry.
3) Reception at Gantry and Storage: The
gantry picks cases by layer and stores them in
the unit load configuration determined most
efficient for storage and picking. The gantry
improves stacking speed and simplicity with
column stacking 60” to 80” long by 30” wide.
4) Order Dispatch: The system communicates
with the WMS (Warehouse Management
System) and downloads order information.
The main control system dispatches individual
orders to each gantry.
5) Automatic Picking: Gantries will pick up
single or multiple cases, as required, and
place them on one of the multi-layered sections
of the conveyor. Each level of conveyor
represents a different destination at the dock,
which eliminates the need for sorting and
scanning after the pick.
6) Palletizing and/or Trailer Loading: Orders
arrive at the trailer for manual direct loading,
or palletizing.
While robotics may not be the answer to
every warehousing operation, when applied
to the right high volume environments, return
on investment can be exceptional. The key to
success is understanding how to get the best
value for your technology investment.
________________________________________
Derek Rickard is Distribution Systems Manager for
RMT Robotics in Toronto, a specialist in end-to-end
integration of automated warehouse and distribution
systems.
|
 |
 |
|
|
|