Keeping Track of Inventory

What Is Keeping Track of Inventory, and Why Does It Go Wrong?

Keeping track of inventory means knowing what you have, where it sits, and how much is already promised. Every operation must answer 3 questions: what, where, and how many.

Records drift for 3 common reasons:

• Stock is counted in one place and sold from another.
• Data lives in several files that disagree.
• Updates wait for someone to remember to type them in.

Scan-based counts help here. GS1 sets the barcode standards that make a scan mean the same thing everywhere. Drift is a habit problem first and a tool problem second.

What Does Inaccurate Inventory Cost You?

Bad counts cost you sales, cash, and staff time. The causes are plain.

• A stockout means a lost order. The shelf shows 10, the bin holds 0, and the customer waits.
• Overbuying ties up cash on shelves. The US Census Bureau tracks wholesale inventories because that cash is large.
• Hunting and fixing take hours. Say 3 people spend 6 hours a week at $22 an hour. That is $20,592 a year.

The FTC rule on mail and online orders expects you to ship when you said you would. An accurate count protects that promise.

How to Keep Track of Inventory: Three Basics

Three habits do most of the work: a clean item list, a home for each item, and a record of each move. Teams that learn how to keep track of product inventory start here.

Know What You Carry

Build one item list. Use the same name for the same product every time. Give each product a unique SKU, which is a short item number. Define units once: each, case, or pallet. A case of 12 is not 12 cases.

Give Every Item a Home

Label bins, shelves, racks, and zones. Record the location, not just the quantity. Warehouse inventory is easy to find when each item has an address. Set one rule for overflow stock, such as "extra goes to zone C, and the record says so."

Record Every Movement

Log receiving, picking, transfers, returns, and fixes. Make the record at the moment of the move. Catch-up entries at day end fail because people forget. A pick of 5 units becomes 4 in memory. Small misses stack into big gaps.

Which Counting Method Fits Your Space?

Two methods exist: full counts and cycle counts. Pick by staff size, SKU count, and how much downtime you can take. IRS Publication 538 says "To figure taxable income, you must value your inventory at the beginning and end of each tax year." So some count is required.

Full Physical Counts

A full count tallies everything at once, often at year end. The upside is a complete picture. The downside is a pause. Shipping often stops while staff count. A full count suits small SKU lists and quiet seasons.

How Does Cycle Counting Work?

Cycle counting means counting a small section on a set schedule. Count a few bins each day. Count fast-moving or high-value items more often. Errors surface early, and nothing shuts down. Cycle counts also show why inventory counts do not match the shelf: you see the cause while it is fresh.

A full count shows the whole picture once. A cycle count keeps it true all year.

How Do You Set a Reorder Point and Trace Lots?

A reorder point is the stock level that tells you to buy again. The formula is daily use times supplier lead time, plus a safety cushion.

Example: you ship 20 units a day. The supplier takes 5 days. That is 100 units. Add a cushion of 30. Your reorder point is 130. Review it when demand shifts.

Some goods need more detail:

• Track lots when a recall or customer claim needs a batch trace.
• Use first-in, first-out where products age, so old stock ships first.
• Track serial numbers only for items that need them.

Track at the detail level you need and no deeper.

When Do Spreadsheets Stop Working, and Where Does Your Accounting Software Fit?

An inventory spreadsheet breaks when order volume grows past what one person can keep straight. Small shops do well with one at first. Then trouble shows up:

• Many copies exist, and no single source of truth.
• No alerts fire, and no log shows who changed what.
• An Excel file, an Access database, or an email chain makes sense to one person only.

Accounting software is a different job. Your accounting software's inventory tools suit the books, and you can keep them. Bin and pick detail often lives outside the books. Connect the two instead of replacing your accounting.

Signs you have outgrown manual work:

• Counts rarely match the shelf.
• Staff type the same data in 2 or 3 places.
• One person holds all the knowledge.
• Orders slow down while staff check stock.

When 2 of those fit, fix the manual steps first.

Do You Need a Big ERP to Track Inventory?

No. Most small operations only need to fix the manual parts. An ERP is a large system that runs many business functions. Long, costly rollouts are a real worry, and the worry is fair. Match the tool to the problem. The NIST Manufacturing Extension Partnership offers vendor-neutral guidance on supply chain process.

Custom inventory software can be built around how you already work. It can keep your accounting package in place and replace only the hand-typed steps. It works at small scale. The Software Society builds software, websites, and search presence with one team. That keeps the data in one place.

Frequently asked questions