Week 7

“ ervoor zorgen dat als spullen uit verschillende zones komen, dat ze alsnog in hetzelfde doosje komen”

Fixed location storage

Also known as assigned location storage, or dedicated location storage

Each SKU gets its own location(s), and no other products may be stored in those locations under any circumstance

Random location storage

Also known as floating location storage

Any SKU may be assigned to any location, and that may change each time

Put products with higher demand at better locations (see example on following slides).

Almost always used in combination with fixed location storage (after all, if you fix the product location anyway, then why not assign the most appropriate product to it).

Cube-per-order index

A frequently requested product with a large storage volume, should not be put in the best locations if there are slightly less requested products with a significantly smaller storage volume.

“place SKUs in locations based on the ratio of their activity to the number of openings or slots assigned to the SKU”.

Looking at this, the first pallet may classify as a fast mover and the last pallet as a slow mover.

Time-in-residence assignment involves estimating the duration of storage for each incoming unit and making appropriate assignments.

Class-based storage

Combines advantages of fixed location storage and random storage.

That is, high(er) space utilization, with low(er) space utilization

Picker to part

Part to picker

Vertical carousel

Miniload

KIVA

Autostore

- single order picking (SOP)

- sort-while pick

- pick-and-pass

- pick-and-sort

-Bucket brigades

- wave picking

- parallel order picking

Each area of the warehouse can be divided in a number of zones.

Aspects to consider when creating zones are

• Congestion

• Product categories

• Capacity of the vehicle

• Work load of the order pickers

• Travel distances

Note that there is potentially a problem with zoning: order integrity.

Batching is a collective term for all techniques that split up and combine (parts of) customer orders into pick orders

Advantages of batching

Less distance to travel

Lower average extracting time

Disadvantages of batching

Products need to be separated

If separation is done by the order picker

Higher complexity

More picking errors