# Manage inventory based on material properties



> Use mill certificate properties in inventory rules, so GoSmarter helps pick the right stock for the job instead of guessing.
> 
> **URL:** https://www.gosmarter.ai/changelog/manage-inventory-based-on-material-properties/

**Date:** 2026-06-23
**Type:** improvement

**Summary:** We've just extended the rules engine for inventory to allow the use of values from linked mill certificates / material test reports for heat codes associated to an inventory so you can ensure you're always picking the right stock for the job. This…



We've just extended the rules engine for inventory to allow the use of values from linked mill certificates / material test reports for heat codes associated to an inventory so you can ensure you're always picking the right stock for the job.

This works whether you've got a single heat code or multiples for a given stock line, by providing min, max, and average options for fields from the mill certificates. So for instance, you stock steel and it must always have a CEQ of more than 0.4 for a specific weld, you can create a rule for the inventory for the weld procedure that verifies the CEQ min % i.e. the smallest value for the matched heat codes, is greater than or equal to 0.4. when this condition is met, the inventory gets the tag for the weld procedure.

![image](https://frill-prod.s3.us-west-2.amazonaws.com/3527204/1b505993-9aa1-4ff9-aee8-50fef172e7e9.png)