INVENTORY • REORDER • EXCEL

How to Build an Inventory Reorder Report

A corporate framework for turning stock balances, demand history, lead time and safety stock into an actionable reorder report. The examples use a fictional multi-location distribution dataset.

1. What Does an Inventory Reorder Report Do?

An inventory reorder report helps a business identify items that may need replenishment before available stock reaches an unacceptable level.

A useful report should connect four ideas: current stock, expected demand, replenishment lead time and the agreed safety buffer.

2. Build the Item Master and Stock Dataset

Start with a structured table. Avoid mixing item descriptions, units of measure and reorder rules in manually typed summary cells.

3. The Core Formula: Reorder Point

A common starting point for a reorder report is the Reorder Point (ROP). One practical formula is:

For SKU-1001 in the example:

With current stock of 420 units, the item is above the example reorder point. This does not automatically mean that no purchase action is required; an actual decision may also consider open purchase orders, pending transfers, demand changes, minimum order quantity and supplier conditions.

4. Calculate Average Daily Usage

Daily usage should be based on a clearly defined historical period. For example, a 30-day or 90-day period may be used depending on the business cycle.

In Excel, if total usage is in B2 and the number of days is in C2:

5. Calculate Reorder Point in Excel

Assume these columns exist: F = Avg Daily Usage, G = Lead Time Days, H = Safety Stock.

The formula is intentionally simple. In a production inventory system, the business rules around demand, seasonality and lead time should be documented separately.

6. Add Available Stock Instead of Looking Only at Physical Stock

A stronger report distinguishes physical stock from stock that is actually available for planning.

The exact definition should match the company's ERP and inventory policy. Never assume that every unit physically present is available to promise.

7. Calculate Stock Coverage

Stock coverage estimates how many days the current available stock could support the current demand rate.

Comparing stock cover with supplier lead time gives an additional management signal. For example, an item with 5 days of stock cover and a 12-day lead time deserves review.

8. Create a Reorder Status

Once the key calculations exist, create a transparent status column.

Here, I2 represents available stock and J2 represents reorder point. The business may add additional rules for open purchase orders or transfers.

9. Add Reorder Priority

Not every exception needs the same urgency. A priority field helps procurement, stores and operations focus on the right items.

The 50% threshold above is only an example. Priority thresholds should be defined by the business based on service levels, lead time and stockout impact.

10. Use SUMIFS for Location-Wise Inventory Reporting

In a multi-location business, management often needs to know total quantity, reorder value or exception count by warehouse or distribution center.

You can add more criteria for category, supplier, SKU family or status.

11. Count Reorder Exceptions With COUNTIFS

A management summary can include the number of items requiring action.

This is useful for a daily or weekly exception dashboard because management can see how many SKUs need attention before opening the detailed report.

12. Recommended Inventory MIS Columns

13. Build the Management Summary

17. Important Controls Before Using the Report

18. Common Inventory Reporting Mistakes

• Using only current stock and ignoring demand velocity.
• Using an arbitrary safety buffer with no documented business rule.
• Ignoring supplier lead time.
• Counting reserved stock as freely available stock.
• Ignoring open purchase orders or stock transfers.
• Mixing units of measure.
• Using old demand history when the business is changing quickly.
• Showing a “REORDER” flag without explaining the rule behind it.
• Publishing confidential stock or supplier information in a public portfolio.

19. Practical Build Sequence

20. Final Checklist

• Is the stock balance current?
• Are all SKUs using a consistent unit of measure?
• Is demand history clearly defined?
• Is lead time documented?
• Is safety stock based on an approved rule?
• Does the reorder point calculate correctly?
• Are open purchase orders and transfers considered?
• Can a manager see the high-priority exceptions immediately?

13. Excel Result Output — Reorder Dashboard Look

The final Excel report should make exceptions visible immediately. The example below shows a professional colour-coded output using green, amber and red status rules.

14. Colour Formatting Rules for Inventory

Conditional formatting should make the action obvious without opening every calculation.

• Red: reorder required or stock cover below the critical threshold.
• Amber: item is approaching the reorder trigger or needs review.
• Green: healthy stock position based on the defined rule.
• Use the same thresholds in Excel and Power BI so the two reports tell the same story.

15. Power BI Version — Interactive Inventory Dashboard

Power BI can turn the same inventory logic into an interactive management dashboard. The user can filter by warehouse, category, supplier, SKU and priority while keeping the KPI definitions centralized in measures.

Suggested Power BI measures

16. Excel vs Power BI for Inventory Reporting