There is an important distinction between a commercial food processor and one that is designed for home use. Commercial units are more powerful and are built to withstand the use and abuse a commercial kitchen dishes out.
They are also more expensive than many home models, and some restaurants fall into the trap of buying a common household food processor because of the price tag. Unfortunately, when you account for shortened lifespan and lost productivity due to downtime, the added investment required by a commercial unit more than justifies itself.
Safety features are especially important because they can prevent kitchen staff injury, especially with new or untrained help. Most, if not all, modern food processors have built-in safety features designed to minimize the risk of injury. The most common is an automatic shut-off feature, but make sure you check out a list of safety features before you buy any model.