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What is Milk Run in Logistics?

Don’t let the ‘interesting’ name put you off. This method might solve your delivery and efficiency woes within your facility. The Milk run got its moniker from the milk industry practice wherein a single tanker goes to different dairy producers every day to collect milk and then deliver it to the milk processing firm. This ensures that there’s regular supply of fresh milk and that overstocking is prevented. Basically, the milk run in Intralogistics is a delivery method for different loads from a central storage area to different sections of your facility. The milk-run is generally an “in-plant” transportation system where your materials are transported from a central area to different assembly areas within your facility.

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How Does It Apply to Material Handling?

Using the Milk Run method within your facility/factory has become quite common for many lean manufacturing facilities. It simply allows more frequent deliveries of materials and supplies to more than one assembly area or section of your facility that needs to be re-stocked. Often this helps reduce the levels of overstocking or having to manual call for more materials.

In the most common form of this set-up, operators and material handlers conduct defined standard delivery routes throughout the facility. These deliveries are most commonly made to areas of the facility that are in constant need of being re-supplied and are most commonly located on the assembly line. These delivery routes are normally timed out during the shift to operate at peak efficiency, to ensure that the assemblers can continuously assemble according to product schedules.

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The operator will pick up their materials at a central warehouse or “supermarket” and then follow the route delivering or dropping off the material to the assemblers at different assembly stations. These deliveries are most effective and efficient when completed by a tugger train system, leaving different carts, containers and materials at the different assembly stations.

Using a tugger train system is most common when implementing a milk run route within your facility, as using a forklift to complete these routes is very dangerous and quite inefficient.

In a larger set-up there will be more material handlers back at the storage area/supermarket preparing the next milk- run route so the driver of the tugger can easily begin his next delivery route.

Where as in smaller operations this is completed by the same material handler/driver.

Generally the steps within a Milk-Run route can be reduced down to:

  • Loading
  • Travelling
  • Handling of Materials at the drop-off stations
  • In some circumstances waiting can also be a step.

The biggest challenge when initially setting up Milk Run routes is the design and creation of the routes and the timing of the intervals.

This can take a lot of testing, experimenting and time before you get it right. The layout of your facility/ factory is one of the key factors in how you would need to set up your milk run routes. The area of the route and the distance from the storage area to the different assembly stations all play a big role in the effectiveness and efficiency of such a route.

Also, the amount of demand your assembly stations would generate and how often they would need to be re-supplied. This can be difficult to manage and implement because many times the production schedule is unknown and can often change.

Going the Lean Way

Using a Milk Run system should be a part of a bigger lean process implementation for it to be truly effective. It doesn’t take a single milk run delivery to say that you’re doing it properly. It might take years of practice and modification of the approach until you can say that you’re doing it efficiently. FlexQube works alongside many organizations that have implemented milk run routes into their material handling practices with great success. On top of this the FlexQube concept lets our customers create material handling carts that can match any type of materials that you would want to deliver in a milk run route.

If you're looking at beginning with tugger carts, contact us at [email protected]

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