While authoring content in BusinessOptix you have the ability to Check Out your content. This has the effect of preventing other authors from editing the model at the same time, until you check the model back in. This is best practice in organisations with may authors who may be working on similar, if not the same, content.
The administrator of the library can also activate a setting that will automatically check a model out when opened by and author.
To use the check out feature you need to open the File tab in the Author Ribbon and click the Check out button (as indicated on the screen snippet below):
Once you have saved the model you can then check it back in (as indicated) should you wish for other authors to be able to work on the same model.