Inventory Sampling: Requirements, Procedures, and Benefits

In very large warehouses, it is hardly economical to count every single item. This is where the Inventory by Sampling In practice: Instead of a complete census, only a representative sample is collected, and the total population is estimated based on that sample. This article explains the definition, prerequisites, procedures, and advantages and disadvantages.

Key Points at a Glance

• Inventory sampling calculates the total inventory based on a mathematically and statistically selected Random sample high.
• She is according to § 241(1) of the German Commercial Code (HGB) expressly permitted.
• This requires the use of a recognized statistical method and reliable inventory records.
• The result must be equivalent in statistical significance to that of a full-scale survey (confidence level typically 95% %).

What Is a Spot Inventory? – Definition

The Inventory by Sampling is a sample-based method in which only a portion of the inventory items are physically counted. Using recognized statistical methods, the total value of the inventory is estimated from this sample. It is one of the simplified inventory-taking methods provided for under commercial law.

Legal Basis and Requirements

The legal basis is § 241(1) of the German Commercial Code (HGB). For the procedure to be recognized, the following requirements must be met:

1. Recognized statistical method: The sample and the extrapolation must comply with generally accepted accounting principles.
2. Equivalent significance: The result must correspond to that of a full survey—a confidence level of 95 % is standard.
3. Reliable inventory accounting: Proper inventory management must be in place.

Procedure and Process

1. Define the population: All inventory items are recorded.
2. Taking a sample: A representative sample is selected according to statistical rules.
3. Physical collection of the sample: Only the selected items are counted.
4. Projection: The total population is estimated based on the result (e.g., estimation of the mean).
5. Verification of the security level: Statistical accuracy is demonstrated.

Advantages and Disadvantages of Inventory Sampling

Advantages

• Significantly less effort is required to count large inventories.
• Shorter inventory count time, less downtime.
• Lower personnel costs.

Disadvantages

• Requires statistical expertise or appropriate software.
• This is only practical for large, homogeneous populations.
• Requires very good inventory records.

Implementing Inventory Counts Using Software

A spot inventory relies on accurate inventory records as its data foundation. Digital inventory management provides a clean population and documents the count in an audit-proof manner.

With Inventory ONE Record inventory using Barcode or QR Code Scan, the Mobile Inventory Count via App processed directly at the warehouse and received audit-compliant records at the touch of a button. Learn more on our pages about Inventory Software and Inventory management.

Frequently Asked Questions About Inventory Sampling (FAQ)

Is a spot inventory permitted by law?

Yes, pursuant to Section 241(1) of the German Commercial Code (HGB), provided that a recognized statistical method is used and the result is equivalent to that of a full inventory.

For which companies is a spot inventory worthwhile?

This is especially true for companies with large, homogeneous inventories and reliable inventory records.

What level of security is required?

A confidence level of 95 % with a maximum relative sampling error of 1 % is standard and accepted.

Series: An Overview of Inventory Types

This post is part of our series on inventory types. Here you'll find all related articles:

• Inventory Types – A Comprehensive Overview
• Continuous Inventory
• Point-in-Time Inventory
• Inventory by Sampling (this article)
• Postponed Inventory Count