21 Mistakes adding cost and killing productivity in your warehouse #19: Failing to invest in equipment, systems and technology

Equipment, warehouse systems and technology can be expensive and is an optional expense in the sense that it is not required to operate your business.  For these reasons some businesses shy away from making capital purchases.  The same businesses that do this will also have no problem meeting a non-optional but high wages bill every week and pay overtime when required to meet customer demand.  In our experience, provided the correct equipment is bought for your requirements, the investment in warehouse technology, systems and materials handling equipment is always rapidly paid for in reduced labour costs, let alone increases in accuracy and quality, responsiveness and improved safety.

Once you have adjusted your attitude to technology from scary cost to business investment, you will never look back.  Look at every purchase as an investment in productivity and calculate the return and payback period.  If you lack the capital to invest then leasing or borrowing is usually a viable option if your business is strong.  The payback even for large investments will typically be less than one year, so if capital is tight, a loan or lease agreement can be structured to be cash flow positive to your business almost immediately.

Delaying an investment in productivity will usually only cost you money in lost cost reduction.  Although you don’t feel this the same way as a sudden jump in costs, the impact is the same.  Should you treat it as any less urgent?  It is for this reason that I think failing to invest in technology when the option is available to you is wasting money.
Let’s look at how you can do a basic return on investment calculation for an area of business need.  My number one technology investment recommendation for a warehouse is to implement a Warehouse Management System (WMS).

Let’s look at a return on investment calculation for the Rapid WMS that we will be making available soon for the small-medium business market.  For a modestly sized warehouse running a simple paper based ordering system and employing 12 people an investment of a little over $90k pays for itself in less than seven months and makes you $1.5M richer over ten years, that is an average interest rate of 170% p.a. (flat) over 10 years.  You can’t get that from a bank!

Item	Unit Cost	Units	Cost
Project cost			$            91,750
Current FTE (Labour cost)	$            55,000	12	$          660,000
Estimated Productivity Gain	25%
FTE reduction saving	$            55,000	3.00	$          165,000
Revised Labour Cost	$            55,000	9.00	$          495,000
Payback in Months			6.67
Net profit gain year	1		$        73,250
Net profit gain by year	2		$      238,250
Net profit gain by year	5		$      733,250
Net profit gain by year	10		$   1,558,250

Unfortunately not all investments in technology will have as high a payback as the first implementation of a WMS but you get the idea.  Find an area of need where labour can be saved and service quality increased, find a solution that you like, calculate the return,  implement it well and reap the rewards.

This is post is taken from an ebook that is now available as a bonus to members of the Warehouse Performance Initiative (WPI*).

The WPI is a place for learning how to improve your knowledge of warehouse operations improvement, sharing skills and ideas and helping other warehouse professionals.  Joining the WPI will give you access to a growing range of free and premium content which will have a direct impact on improving your warehouse performance when you apply it to your business.

You can also subscribe to this blog by email and get my future posts delivered to direct your inbox.

21 mistakes adding cost and killing productivity in your warehouse - #14

14.   Incorrect picking methodology

Picking is the highest labour activity in the warehouse and consequently gets a lot of focus on optimising it by both the Warehouse system developers and the materials handling equipment manufacturers.  Failing to select the best picking methodologies for your particular business needs will see you missing out on what can be relatively easily won productivity gains.

There are three basic picking methodologies and a nearly endless variety of variations depending on the technology, equipment and layout employed in your warehouse.  The three basic picking methods are:

1.    Discrete picking

a.    Picking one order in its entirety before moving onto the next order.  This is the standard picking method employed by all order processing systems.

b.    Most suited to intermediate to large sized orders comprising multiple pallets or cartons of stock (including large re-pack orders).

2.    Multi-order picking

a.    Picking several orders at once in one pass through the warehouse.  If you have ever grabbed pick slips for a dozen single line orders and sorted them into correct travel sequence then you have performed a multi-order pick.

b.    The key to multi-order picking is to create a batch of orders that can be picked by one person onto one trolley.  Each order is assigned a carton number.  The picks are sorted into travel path sequence regardless of the order number.  Each pick is taken from the shelf and placed into the carton number associated with each order.

c.    Multi-order picking functionality is normally only provided by a WMS, but provided you have a modern system with some flexibility in data access, it is quite possible to create a paper based multi-order pick. (Contact us for more details)

d.    Suited to small order sizes where the entire order will fit into one or two boxes.

3.    Batch pick and assembly (also called consolidated picking)

a.    Performing a single pick for the sum of the quantities required for each item in a batch of orders.  This allows a single pass through the warehouse to pick an entire wave of orders.  The stock is staged in an assembly area and needs a subsequent pick process to assemble the individual orders.

b.    Most suited to picking from slow to access areas where discrete picking would be very slow.  This can be used as an entire picking strategy but be wary of the fact that the assembly process is effectively double handling and the selection of items from a large batch pick can be slow.

c.    The slow assembly process can be facilitated by locating the items in the assembly area so that they can be found quickly.  This functionality is not common, but not difficult to code if required, and manual workarounds can also be devised to speed the selection process.

Some common variations and combinations are:

·        Discrete pick the fast zone batch pick the slow zone or bulk areas

o   In this method the majority of the order picks are done for a single order from the fast pick area and a second batch pick for the order wave collects the stock from the slow zone and stages it in an area of the fast pick zone. The order picker then collects what he needs from this staging area to complete the order and thus avoids the travel time through the slow zone.

·        Multi-order pick the fast zone and batch pick the slow zone

o   Similar to the above but more suited to small order picking.  As above but the picker completes multiple orders in one pass through the fast zone.

·        Zone picking (discrete or multi-order or batch)

o   For very large orders or where stock requires different storage conditions grouped into location zones (such as temperature control, security, dangerous goods, special racking).  The order is broken up into zones and picked separately in each zone (often by different operators).  The picks from each zone are usually then brought together on the dock for consolidation for shipping purposes.

Further adding to the options available are various technology and materials handling equipment assisted methods.  Here is a quick summary.

·        Goods to the man systems

o   These are a means to eliminate picker travel and speed up picking.  They can be used for discrete or multi-order picking depending on their level of sophistication.

o   Vertical or horizontal carousels keep the operator in position and move the shelves to present the goods required for picking.  These systems require their own control systems that interact with the WMS to manage the picking and put-away processes.

o   Kiva systems use mini AGVs that move shelves of product to present the goods to the picker.

·        Conveyor based zone picking

o   This methodology is the province of the large distribution centre.  A conveyor moves totes for orders through each zone of the warehouse so that a picker can be restricted to picking from a limited range of items into the tote.  The tote is directed to each zone where a pick is required and ends up at a despatch station for freight labelling and staging.

o   This method also works for carton picks but in this case the picker picks and labels cartons on to the conveyor which directs the cartons from each zone to sortation lanes where the cartons are palletised for each order.

o   Some of the picking may be automated picking systems such as the A Frame high speed picker or AS/RS systems picking pallets and delivering them directly to the dock with AGVs.

·        Wireless terminal assisted picking

o   Warehouse management systems provide the opportunity to manage the information normally presented on a paper pick slip with in any way you could possibly imagine.  An RF terminal can drive discrete, multi-order or batch picking and present the information to the picker via a screen or via voice and even vision based systems

o   Screen and barcode scanning is the most common.  All products and warehouse locations are barcoded to build accuracy into the pick process.  The RF terminal could be fixed to a trolley or forklift, or hand held.  There are also wearable units that allow the user constant use of both hands and eliminate the need to pick up and put down a scanner.

o   Voice directed picking has been implemented widely and is highly efficient because the picker does not have to stop to read a screen or scan a barcode.  Accuracy is built into the process with verbal confirmations of check digits and quantities picked.

·        Pick To Light systems (PTL)

o   Pick to light is a static racking based system usually built into carton live storage (roller racks) that uses a small electronic display at each pick face to indicate how many items to pick.  The operator presses a button to confirm the pick.  This is suited to high volume discrete picking (several hundred units per hour) of small items into repack cartons or totes.  PTL is often one of the zones in a large distribution centre but can also a be stand-alone installation.

What picking method should you use?  This is a very good question and it will depend on your business profile - what sort of inventory you carry and what your order size, quantity and frequency are.  Once this is known then it is a matter of costing the various options to find a suitable return on investment.  The important point to realise is that you may be missing out on increasing both your productivity, service level and accuracy by not taking advantage of what the best picking methods have to offer your business.

This is post is taken from an ebook that is now available as a bonus to members of the Warehouse Performance Initiative (WPI*).

The WPI is a place for learning how to improve your knowledge of warehouse operations improvement, sharing skills and ideas and helping other warehouse professionals.  Joining the WPI will give you access to a growing range of free and premium content which will have a direct impact on improving your warehouse performance when you apply it to your business.

You can also subscribe to this blog by email and get my future posts delivered to direct your inbox.

21 mistakes adding cost and killing productivity in your warehouse - #12

12.    Cluttered and badly organised operations benches

Quite frankly many operations benches that I see are a mess, cluttered and covered in stuck orders, returns, old paperwork, out of date work instructions and broken staplers and tapeguns.  There is no point having a highly efficient warehouse if you lose your hard won productivity gains with slow administration in receiving and order confirmation/packing freight. 

Here are my tips for best practice in operations workbench organisation

• The first aim of an operations bench should be to have nothing on it apart from work in progress.  Computers, printers, labels, pens, cartons, pending paperwork should be stored off the surface of the bench itself.  Either above or below.  This way nothing will get lost or mislaid.  Everything is easily to hand and never in the way.
• Custom make your workbench to suit your process.  Make sure everything is in arms reach from the operator.  This can be as simple as installing some shelves and Dexion bins to give everything a place.  If you work space is limited you can install monitor and keyboard stands to get the computers off the work top.  Printers can be installed under the bench or on a separate stand.
• Lay a padded anti-fatigue mat in front of the bench.
• The areas around the bench must be kept clear also with a standardised workflow of products and paperwork in and out.
• Sometimes the best bench is mobile.  Breaking down a mixed pallet of small items can be done on the dock with a multi-level trolley/bench that allows you to sort, check off, book in a delivery and then roll the trolley to the rack for put-away.
• Similarly on the outbound process, orders picked to a carton on a picking trolley can be checked, labelled and closed on the trolley and then rolled to the dock for staging ready for pick-up.
• Take advantage of wireless mobile terminals, and printers or even a laptop to allow transactions to be completed on the spot without the need for constant travel to/from a bench.  Installing a wireless network in your warehouse (even a cheap one) will free you up to perform warehouse transactions at the point of activity.  This is a key driver of efficiency and accuracy and is a good interim step if you have not yet invested in a WMS.

This is post is taken from an ebook that is now available as a bonus to members of the Warehouse Performance Initiative (WPI*).

The WPI is a place for learning how to improve your knowledge of warehouse operations improvement, sharing skills and ideas and helping other warehouse professionals.  Joining the WPI will give you access to a growing range of free and premium content which will have a direct impact on improving your warehouse performance when you apply it to your business.

You can also subscribe to this blog by email and get my future posts delivered to direct your inbox.

21 mistakes adding cost and killing productivity in your warehouse - #10

10.    Lack of appropriate materials handling equipment

Your choice of materials handling equipment (or lack thereof) will set the level of productivity available to you in the same way as your warehouse layout and racking.  One of my key observations in any warehouse is how well equipment been deployed and how much it eases the physical task.  This will be indicated by how much motion is required to complete a task.  Following the Lean Methodology, motion is a non-value adding waste that should be eliminated where possible.

The classic mistake many warehouse managers make is to think that materials handling equipment is expensive and should be used sparingly.  Regardless of the cost, appropriate materials handling equipment will:

1. increase safety (reducing the cost of safety related incidents),
2. reduce labour (operating expense) and
3. increase capacity,

so that it is soon paid for and generating additional profit through reduced costs and increased output.  

A materials handling system is composed of three elements:

1.    a container,

2.    a mechanical means of moving that container,

3.    a storage system for the container.

Containerisation of goods is the foundation all materials handling.  Basic packaging is packed into or onto a container to standardise the means of materials handling.  For example, a pallet makes a forklift possible.  Although pallet standards vary they are similar enough in concept to allow a forklift to be built that is able to handle the wide variety of pallets available.  Pallet racking provides a place to store pallets of goods with volumetric efficiency.

The containerisation concept is widely applied in many types of materials handling system to increase productivity.  There are a huge variety of materials handling systems available to suit most common applications.  Custom containers and handling systems can also be built for non-standard products and materials.

The most efficient warehouse will make the best use of appropriate equipment.  Here is a quick round up of the different types of materials handling systems:

1.    Trolleys and tote bins

a.    If you have a lot of small order picking and processing then a trolley and tote/carton system is essential.  Multi–order picking to a multi-level pick trolley will allow you to pick several orders in one pass through the warehouse and is very efficient.

2.    Motorised trolleys and stock-pickers

a.    A pedestrian picker is limited to the speed they can walk and how high they can reach.  Using a motorised trolley such as a Crown WAVE or a with a built in ladder or step to allow the picker to reach higher levels, will allow a dramatic increase in the range of stock accessible to a pedestrian picker.

3.    Forklifts

a.    Pallet jack

                                       i.    The most basic manual hydraulic lifting device for moving a pallet.  They only move pallets at floor level.  Motorised units are available to ease the physical effort.

b.    Pallet mover/low level stock-picker

                                       i.    These are large ride on pallet movers that are designed to facilitate carton picking from the first level of pallet racking and can also be used to load semi-trailers.  Some units can carry two or more pallets on extended tines.  Crown now has a unit that is remote controlled so that the picker does not need to get on and off to drive to the next pick bay.

c.    Walkie stacker

                                       i.    A walkie stacker is a most basic type of forklift for moving pallets into the higher levels of pallet racking.  There are a wide variety available and really suit small warehouses with low a volume of pallet movements.  They can work in aisles as narrow as 2.4m to get the best use out of small warehouse spaces.

d.    Counter balanced forklift

                                       i.    These are the traditional looking forklifts with a seat and fork tines out in front of the wheels and a heavy weight (counterbalance) at the rear.  They are now relegated to truck loading and yard work rather than use within pallet racking where a reach truck is more efficient.

e.    Reach truck

                                       i.    The reach truck is so named because it has a mechanism to move the pallet into or out of the racking from the body of the forklift.  
There are two types:       

1.    The moving mast type moves the entire mast back and forth.

2.    The cantilever type uses an X-type extending cantilever to move the pallet back and forth.

These forklifts work in much narrower aisles than the counterbalanced forklift of around 3.0m or less.  They can also now reach to very high levels of over 12m with the use of automatic level selection and video camera assisted positioning.

f.     Stock-picker

                                       i.    The stock picker is designed to carry a person to high levels in storage racking so that they can pick cartons.  This eliminates the need to reach up and pull down and then replace a pallet just to pick off a few cartons.  They are a productivity gold mine in the right circumstance.

g.    Turret truck

                                       i.    A turret truck is designed to work in very narrow aisles of 2.0m or less.  The turret refers to the mechanism that allows the fork tines to swivel from side to side as the turret trucks tines are moveable from side to side.  Most turret trucks also carry the operator to high levels to ease operation and allow for carton picking.  Turret trucks can reach up to 18m in height.

h.    High level cranes

                                       i.    A high level crane does the same thing as a turret truck, but it is built into the structure of the building and located on rails top and bottom so that it can reach even higher levels.

4.    Conveyors

a.    Conveyors are a substitute for moving stock by forklift or other device.  They are very fast and efficient but also very specific and not easily (or cheaply) altered.   Conveyors best suit mature businesses with high order volumes.  They are mostly used in very large and high volume warehouses where the investment is warranted by the high transaction and stock volume they handle. 

b.    Smaller scale applications of conveyors are used but can also introduce inefficiencies when the business needs change and the fixed conveyor no longer suits the new operation but is not updated.  Also when your conveyor system is down it can simply stop you shipping orders.  An efficient but more manual system is more scalable and has the flexibility to cope with changing business needs.

5.    Automated Storage & Retrieval Systems (AS/RS)

a.    AS/RS is a very broad term that can apply to anything from a carousel to a huge warehouse with conveyors and cranes moving pallets in and out of a very high level automated warehouse.  The technology removes human activity and brings the goods to the man for order processing.

6.    Automatic Guided Vehicles (AGVs)

a.    Forklift AGVs are available and well suited to high volume pallet movements often associated with manufacturing plants.  They can be configured as a turret truck and can even load semi-trailers.  Like most automation they are suited to high volume operations and will provide the highest return when operated in a 24/7 environment.

b.    Kiva Systems make a mini AGV that is so good at what it does that Amazon bought the company.  The Kiva system uses many small AGVs to move storage shelves around the warehouse to picking stations allowing the picker to stay put and perform a multi-order pick to carton without having to walk around the warehouse.

7.    Robots

a.    The Baxter Robot may not yet be a viable storeperson replacement yet, but watch this space. These devices will only get better and in 20 years or less will likely start to make inroads into all kinds of repetitive manual labour.

This is post is taken from an ebook that is now available as a bonus to members of the Warehouse Performance Initiative (WPI*).

The WPI is a place for learning how to improve your knowledge of warehouse operations improvement, sharing skills and ideas and helping other warehouse professionals.  Joining the WPI will give you access to a growing range of free and premium content which will have a direct impact on improving your warehouse performance when you apply it to your business.

You can also subscribe to this blog by email and get my future posts delivered to direct your inbox.

21 mistakes adding cost and killing productivity in your warehouse - #9

1.    Poor layout and product flow (in and out)

A poor warehouse layout locks in poor productivity and what’s worse is that it becomes invisible.  Because businesses change over time, a once perfectly suitable layout and racking arrangement can become a drain on productivity.  Perhaps the layout was never planned in the first place but racking was simply put wherever it fitted at the time the installer showed up.

The principles of process design dictate that the design of the supporting systems and infrastructure must support the business process.  So in order to get the layout correct you must first design the process that you want it to support - with full knowledge of what is possible.  This is the approach we take to all our warehouse designs – first the process then the layout and systems to support it. 

Many people make the mistake of starting with the current system and the existing infrastructure and then designing a process around that.  Unfortunately when you do it this way, you are accepting your current limitations without question and missing the opportunity to unleash greater overall productivity in your business.  What often starts as a need for some new racking, or an observation that you are running out of space in your warehouse can be an opportunity for a major reform and productivity gain if you open your eyes to what is possible.

The basic principles of efficient warehouse layout are as follows

1.    Keep fast moving product in the fastest to access areas.  The corollary also applies, put slow moving items in the slowest to access storage areas.

a.    If you have a bad building with pillars and walls in all the wrong places then this idea is what will bring back the productivity into your operations.  Many businesses simply do not apply this principle to their warehouses or do not apply it rigorously enough to get the full benefit.

2.    Use fixed pick locations near to the despatch dock with a periodic replenishment cycle.  This keeps fast moving products close together to reduce travel path.

a.    This requirement must be balanced by the need to allow sufficient access to the pick face so that all of the orders for fast moving product may be picked.  Too close together and you can create crowding as too many pickers need to access the same product at the same time.

3.    Store the balance of fast moving stock in randomly located bulk storage racks.

a.    As per point 1: in bulk storage racks, keep the faster moving products in the fastest to access locations, which, in pallet racking, will be low and nearest to the despatch dock.

These first three points are related to the idea that is commonly called product slotting.  They are important to layout because they will impact what type of racking you put in your fast zone.  We will talk more about slotting in mistake number 15.

4.    Build travel shortcut aisles into long runs of racking or shelving so pickers can cut across aisles to reduce travel path.

a.    Pallet racking should be continuous with beams removed in one rack bay to a sufficient height to let your forklifts travel underneath the higher levels.

5.    Maximise the use of the building volume with high level pallet racking, multi-level shelving modules and mezzanine levels.

a.    Generally you can stack stock to up to 45cm below the level of your sprinkler heads but check with your fire system maintenance provider for the clearance required for your particular installation.

6.    Eliminate air – your stock does not need to breathe!

a.    When I walk into a warehouse, one of the first things I look for is storage density as indicated by the amount of free space (air) around products in the storage racking.  Lots of air means lots of wasted space which means higher storage cost per unit, longer travel path for put-away and picking and poor productivity.

b.    Once you realise that an investment in the most appropriate racking and storage systems for your products is an offset of both rent and operating expense you will not quibble over the cost anymore.  Good racking and storage systems make you money, last indefinitely and are never superseded.  Is any other investment this good? (Maybe real estate!)

7.    Build optimised workstations for receiving, packing and despatching orders near the inbound and outbound docks.

a.    Too much focus just on the pick process and neglecting the whole of the warehouse operations will see you missing out on valuable productivity gains.  However your stock comes in or goes out, you need space and efficient process to get it into or out of the warehouse.

b.    This means a well laid out operations bench which is kept clear of junk and has everything you need to hand such as labels, packing materials, paperwork, computer workstation (if required) & printers.

8.    Allow sufficient staging space for inbound and outbound order staging and processing.

a.    Around the workstations and at each dock you need clearance for staging of product in and out.  Nothing kills productivity and throughput rates faster than the double handling caused by inadequate staging space.

9.    Principles of good warehouse layout must be applied as part of the overall operational process design. This includes the warehouse management system, data collection technology (mobile terminals with barcode scanners, voice directed task technology), racking systems and materials handling equipment.

This is post is taken from an ebook that is now available as a bonus to members of the Warehouse Performance Initiative (WPI*).

The WPI is a place for learning how to improve your knowledge of warehouse operations improvement, sharing skills and ideas and helping other warehouse professionals.  Joining the WPI will give you access to a growing range of free and premium content which will have a direct impact on improving your warehouse performance when you apply it to your business.

You can also subscribe to this blog by email and get my future posts delivered to direct your inbox.

How do I improve the productivity in my warehouse?

This is a lightning overview of how to get some rapid productivity gains in your warehouse.

First off you should really assess the match between business strategy and the warehouse operations. No business is static, and now more than ever fundamental changes in markets and customer behaviour can creep up on a business and require a revised approach to your stock management and order fulfillment strategies.  If your customers are now ordering more frequently in smaller order sizes or your direct to customer online business has taken off then your costs per sales dollar may have sky-rocketed and your warehouse may need a rethink.