---
title: "Sub batch sampling"
slug: "sub-batch-sampling"
description: "Define sub-batch sampling rules with fixed value, percent, or square root options to support accurate quality control."
tags: ["Life Sciences", "Quality Control and Assurance"]
updated: 2026-06-25T10:24:11Z
published: 2026-06-25T10:24:11Z
canonical: "docs.staedean.com/sub-batch-sampling"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.staedean.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sub batch sampling

The **Sub batch sampling** parameter in the **Item sampling** form (**Life Sciences Quality Control & Assurance > Setup > Quality control > Item sampling**) allows users to set the rule for the calculation of the number of sub-batches to be sampled.

If the **Sub batch sampling** parameter is enabled, users can click the **Sub batch sampling** button. The following options are available in the **Sub batch sampling** form:

- **Fixed value** – when selecting this option, the **Fixed value** field is used to enter a fixed number of sub-batches to be sampled.
- **Percent** – when selecting this option, the **Percent** field is used to enter the percentage value of the total number of sub-batches to be sampled, and the **Fixed value** is used to enter a fixed number of sub-batches to be added to the calculated number of sub-batches to be sampled.
- **Square root** – when selecting this option, the square root of the total number of sub-batches will be sampled, and the **Fixed value** is used to enter a fixed number of sub-batches to be added to the calculated number of sub-batches to be sampled.

> [!NOTE]
> Note
> 
> Based on the value obtained from the calculation, it is possible to round-off **To nearest**, **Up**, and **Down**.

#### Example

According to the item sampling “IS001” configuration, the system considers the rules defined in the **Sub batch sampling** form as follows:

From 0 to 6 sub-batches, the system shall sample half of the sub-batches (rounded up):

- **Value specification**: **Percent**
- **Percent** “50”
- **Fixed value** “0”
- **Round-off**: **Up**

From 7 to 15 sub-batches, the system shall sample 3 sub-batches:

- **Value specification**: **Fixed value**
- **Fixed value** “4”

From 16 sub-batches on, the system shall sample the square root of the total sub-batches received plus 1:

- **Value specification**: **Square root**
- **Fixed value** “1”
- **Round-off**: **To nearest**

Based on the configuration above:

- If 5 sub-batches are received, 3 sub-batches will be sampled.
- If 12 sub-batches are received, 4 sub-batches will be sampled.
- If 27 sub-batches are received, 6 sub-batches will be sampled.

The total number of sub-batches received/produced and the number of sub-batches to be sampled out of it is displayed in the **Quality orders** form (in the **Sub batches total** and **Sub batches to sample** fields, respectively).

## Related

- [Item sampling](/item-sampling.md)
- [Advanced item sampling](/advanced-item-sampling.md)
- [Quality control setup](/quality-control-setup.md)
- [Life Sciences Quality Control & Assurance](/life-sciences-quality-control-assurance.md)