Frequently picked items keep fixed ground-level locations; slow-moving reserve pallets use any safe open rack position.
When this method works well—and when it does not
Works well when
- Hybrid profiles with a fixed forward face and random reserve
- Reliable barcode/location confirmation
- High product churn or seasonal assortment
- Operations willing to maintain accurate capacity data
Usually a poor fit when
- Manual memory-based control
- Highly incompatible or regulated material
- Locations that are not uniquely identifiable
- Very stable operations with few products
Show exactly what happens at each step
Write down actions that someone can see or confirm: what the worker does, what moves, who owns the next step, and what happens if something goes wrong.
- 1Habitual location
- 2Overflow anywhere
- 3Unwritten tips from experienced workers
- 4Search
- 1Classify storage mode
- 2Choose valid location
- 3Confirm placement
- 4Check problems
Get these basics right before adding technology
- One named person owns the process, and everyone agrees what one task includes
- Current time, accuracy, problem, and volume numbers collected using written rules
- One named person corrects product and location information
- A written backup method and a clear path for getting help
If workers cannot reliably identify the item, order, or location, correct that problem before expecting new guidance equipment to improve accuracy.
Step-by-step procedure
- 01
Classify which products truly need fixed faces
- 02
Use random reserve only with reliable load/location identity
- 03
Protect pick frequency and ergonomic constraints
- 04
Expose overflow as a status, not a secret
- 05
Revisit fixed-space assignments on a defined timing
Information the process must track
For each task, decide what item or order is being worked, where it comes from, where it goes, how much is expected, how the worker confirms completion, what happens when something goes wrong, and which system records the final result.
Technical notes for the warehouse software or IT team
Use one unique task ID. Re-sending the same message should not create a duplicate move or pick. Keep a way to compare records and repair differences when messages are delayed, repeated, or missed.
Decide what workers should do when something goes wrong
Check location confirmation, label quality, and problem moves.
Add rules to combine split stock or keep related products together.
Resize the face or change replenishment policy before adding more reserve.
Numbers to watch
Before the test starts, write down what is counted, what it is divided by, when the clock starts and stops, what is excluded, and where the data comes from. Keep those rules the same through the test.
Test it on a small scale before a full rollout
Trial steps
- Choose one realistic area, shift, and order mix
- Watch the current method long enough to include normal work and a busy period
- Test the new method using exactly the same measurement rules
- Review every problem and worker workaround before expanding the change
What must be true before rollout
- The target output is maintained for one full, realistic shift
- Accuracy and problem recovery meet the written target
- New workers can follow the process without unwritten tips from experienced workers
- The backup method works, and the team can return cleanly to the normal process
Voodoo is one possible way to guide the work—not the answer to every problem.
Where it may help
Guidance helps workers find changing random locations and can mark temporary overflow positions.
See how Voodoo worksWhen to choose something else
For fixed storage with few products, clear fixed labels and scanning may be simpler than active displays.
Read how recommendations are made