The team first selects eight-order cart picking, then tests whether scanners or location displays guide that cart best.
When this method works well—and when it does not
Works well when
- Any operation redesigning each- or case-picking
- Facilities comparing practical automation levels
- Managers who can provide realistic order-line data
- Teams willing to test two plausible methods
Usually a poor fit when
- Primarily full-pallet forklift movement
- A process whose actual constraint is packing, docks, or replenishment
- Projects with no baseline or realistic order mix
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.
- 1Pick a technology
- 2Force workflow to fit
- 3Discover bottleneck later
- 1Analyze orders
- 2Choose way to organize the work
- 3Choose guidance
- 4Test end-to-end
- 5Measure
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
Analyze order lines per order, units per order line, how much work comes from the busiest products, how often products are ordered together, and peak shape
- 02
Map travel, search, confirmation, handling, and problems separately
- 03
Rank at least two ways to organize the work
- 04
Model consolidation and replenishment—not just picking
- 05
Test using identical measurement definitions
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
Measure later wait time, sort, pack, and cutoff flow.
Group by order size and mix, product size, zone, and problem risk.
Redesign prompts, barcode quality, ergonomics, and problem path.
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
Voodoo is a strong candidate where visible, flexible location guidance and closed-loop confirmation address search, errors, or training.
See how Voodoo worksWhen to choose something else
If travel dominates over location identification, carts, slotting, mobile robots, or goods-to-person may create more value.
Read how recommendations are made