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

# Enforce mBOM parts assigned to steps

> Block new procedure versions when any mBOM parts are not assigned to at least one step.

When this setting is on, ION blocks creating a new procedure version if any parts in the mBOM are not assigned to at least one step. This ensures every part has a defined installation point before you can create a new version.

## Enforce mBOM parts assigned to steps

1. In ION, go to **Settings > Production > Procedures**.
2. Turn on **Enforce mBOM parts assigned to steps**.