# Safety critical and/or operational critical? MXSuite allows you to mark a category as critical. MXSuite offers the option to filter all tasks based on criticality. Using that, the worklist can be filtered on critical equipment. There are 2 types of critical marks: 1. Safety critical: this is used to mark a category (equipment) as safety for ISM / class, such as a main engine. 2. Operational critical: this is to mark a category (equipment) as safety for operational use, such as a towing winch. There are different icons used to indicate critical categories:
**Icon****Explanation**
[![image.png](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/scaled-1680-/cuWimage.png)](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/cuWimage.png) The category is marked as **safety critical**.
[![image.png](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/scaled-1680-/ykbimage.png)](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/ykbimage.png) The category is marked as **operational critical**.
[![image.png](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/scaled-1680-/PQvimage.png)](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/PQvimage.png) The category is marked as **safety critical** and **operational critical.**
To mark a category as critical: Right-click on a category and select **Mark as safety critical** or **Mark as operational critical**. [![markascritical.png](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/scaled-1680-/markascritical.png)](https://docs.mxsuite.nl/uploads/images/gallery/2024-11/markascritical.png)