A change log is a tool that exist through out PLM. 

This tool allows a user to access historical data about changes made in PLM:

- Who made the change.

- When the change was made.

- What information was changed from and to.

Below figure illustrates how to read the information found on a change log.

Some areas where change logs are available are:

- Colors

- Color Palettes

- Overview Section

- Colors Section

- Materials

- Overview Section

- Colors Section

- Images

- Designs

- Overview Section

- Colors Section

- BOMs (Within a BOM)

- Measurements (Within a Measurement) 

- BOM Templates

- Measurement Templates