Signs your plant has outgrown spreadsheet inventory management

Many small manufacturers run inventory planning in Excel, and there is nothing wrong with that. Spreadsheets are flexible, familiar and already paid for. But at some point, the spreadsheet stops helping and starts hiding problems. This article lists eight signs you may have reached that point, and what to try before buying new software.

Eight signs

1. One person holds the keys

If one planner built the file and nobody else can maintain it, the business depends on that person being available. Holidays, sick days and resignations all become risks.

2. Manual copying every week

When someone exports data from the ERP, pastes it into a workbook and fixes the formatting every week, errors are almost certain. A single pasted row in the wrong place can distort a whole order plan.

3. Reorder points nobody updates

If reorder points and safety stock were set years ago because updating them takes too long, the spreadsheet is no longer reflecting your real lead times and demand. See the reorder point formula guide.

4. Several versions of the truth

Purchasing has one file, production has another and sales has a third. Meetings turn into arguments about whose numbers are right.

5. Simple questions take days

Questions like “which parts come from one supplier?” or “what is our duty exposure by supplier?” should be easy to answer. If they take days of manual work, the data structure is holding you back.

6. The file is slow or fragile

Very large workbooks with many lookups can slow to a crawl or break when someone inserts a column. Teams start avoiding changes because they fear breaking something.

7. Shortages and excess at the same time

When you regularly run out of some parts while others pile up, your planning rules are not keeping up. The spreadsheet may be part of the cause, or it may simply be the place where outdated rules live.

8. Growth is coming

A new product line, a second shift or a new building will multiply the workload. If the current process is barely coping, it will not scale.

What to try before buying software

Several of these problems can be fixed without new software:

• Use your ERP more fully. Many ERP systems have reorder point, safety stock and MRP features that are not switched on or configured.
• Automate the export. A scheduled report or a simple data connection can replace manual copying.
• Document the file. Write down how it works, so more than one person can maintain it.
• Update the rules. Recalculating safety stock and reorder points with current data can fix shortages and excess without changing tools. Our free safety stock calculator and reorder point calculator can help.
• Simplify. Use ABC/XYZ classification to focus detailed planning on the items that matter.

When new software is justified

New software is usually worth evaluating when:

• You have tried the fixes above and still cannot keep up.
• You have many items with enough history for statistical forecasting.
• You need several people to work from one shared plan at the same time.
• Your data is clean enough for a tool to rely on. Check with our data readiness checklist.

Read ERP, MRP or a planning add-on? to compare the options.

A lighter option

Some plants do not want to run a new system at all. They want to know, each month, which parts need attention. That is the idea behind Parts Desk, our monthly parts review for US plants of 50 to 250 people, currently in early access. Learn about Parts Desk.

For the full guide, see supply chain software for small manufacturers.

Frequently asked questions

Is Google Sheets better than Excel for inventory?

Shared online spreadsheets help with version control and collaboration, but they have the same basic limits. The bigger issue is usually the process and data, not the spreadsheet brand.

How long does a spreadsheet cleanup take?

For a focused set of items, documenting a file and updating its rules can take days to a few weeks, depending on its size and the state of the data.

What if the person who built the file has left?

Start by documenting what the file does and checking its formulas against a few known items. Then decide whether to rebuild it more simply or move the logic into your ERP.