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GullySystem
A practical guide

Why warehouse stock never matches the system after a count

Ganesh HSStrategy and Technology, GullySystem
Practical advice · 5 min read

In this guide 6 sections
The short answer

Stock misses the system because small errors enter at receiving, putaway, picking and damage handling, then pile up unseen until the annual count exposes them all at once. Trace each difference to a single cause. Bin-level records and regular cycle counts catch them early.

Most differences begin at the dock door

Receiving is where the first errors enter. A driver hands over forty cartons and the delivery note says forty, yet the goods receipt is keyed as fourteen, and everything downstream inherits that mistake.

Short deliveries are the next problem. If the receiver signs for the full purchase order quantity without opening the pallets, the system holds stock that never arrived, so buyers see cover that does not exist. Mixed pallets hide shortages too.

Receive against the purchase order line by line, count before signing, and record shortages on the receipt itself, so the supplier’s credit note can follow the same paper. A dock correction takes a minute. After a count it takes a day.

Units of measure quietly multiply errors

A supplier sells in cartons of twelve. The system tracks eaches, so one person receives ten cartons as ten units while another issues a single piece as one carton. The record drifts by a factor of twelve in both directions, and nobody notices until the count, when a whole aisle looks wrong.

Pallets, cases, inner packs, kilograms and metres all create the same trap, since conversion factors are typed once at item creation and rarely checked after that. Suppliers change pack size without telling anyone.

Keep one stocking unit per item, store the conversion to every buying and selling unit, and show both on the handheld screen.

  • Pack size recorded per supplier, not per item only
  • Stocking unit shown beside every quantity field
  • Alert when a received quantity is far above the usual
  • Conversion changes logged with date and user

Putaway, damage and picks leave no trace unless you ask

Putaway to the wrong bin is the classic. The stock exists, but the system says bin B-14-2 while the pallet sits in B-14-3, so the picker finds nothing and shorts the order. On paper it is missing. In the aisle it is merely misplaced.

Damage is rarely recorded. A forklift crushes a corner of a pallet, the cartons go to the damage cage, and the system still counts them as sellable. Returns that are opened and found faulty vanish the same way, because nobody moves them out of the sellable bin and into the quarantine rack.

Unscanned picks are the last leak. Someone ticks the line from memory to save time, takes the wrong colour or size, and the stock record moves for an item that never left.

Records a custom warehouse build needs

A count that matches is the result of records kept at the right level, because totals per item hide the cause of each error. A bin-level record with a movement history shows who moved what, when and from where, so a supervisor can follow a pallet from dock door to pick face.

A custom build can enforce scan-to-confirm at each step, refuse a putaway to an unmapped bin and block a pick from a quarantine location. It can also schedule cycle counts by risk, with fast movers weekly, high-value items more often and slow lines once a quarter, each task pushed to a handheld.

  • Stock by bin with a full movement history
  • Scan required at receipt, putaway and pick
  • Damage and quarantine locations separate from sellable stock
  • Cycle count tasks ranked by value and movement
  • Variance reasons chosen from a fixed list

Start cycle counting this month

Pick twenty items. Take ten fast movers and ten expensive ones, count them in their bins on a quiet morning and compare the result with the system. Do not adjust anything yet. First find why each one differs.

Sort the differences into dock, unit, bin, damage and pick causes, because the longest column tells you whether to build scan-to-confirm, bin mapping or conversion checks first.

Repeat weekly with a fresh twenty item list. Most surprises will have surfaced long before the annual count arrives, and the stocktake itself becomes a short confirmation of numbers you already trust.

Count difference tracer

This single printed page serves one cycle count session. Each row holds an item code, bin, system quantity, counted quantity, difference and counter initials, followed by a note field for what the counter saw in the aisle. Five tick columns for receiving error, unit mismatch, wrong bin, damage and unscanned pick give each difference a cause before the counter moves to the next row. A bottom block totals differences by cause. The biggest leak is clear after one week.

Open a blank worksheet to print

Questions owners ask

Should we adjust the system straight after a count?

Not before looking for the cause. Check recent receipts, transfers and picks for the item and nearby bins, then adjust once you know why and record the reason with the adjustment.

What is cycle counting?

It means counting a small part of the warehouse every day or week instead of everything once a year, choosing items by value, speed of movement or past errors.

Do barcodes alone fix count differences?

They help, but only when scanning is required at each step, because labels nobody has to scan, or bins without labels, leave the same gaps.

How can we find stock that is in the wrong bin?

Search neighbouring bins, the receiving area and the damage cage, then read the item’s bin-level history, because its last movement usually points to where it landed.

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