If the project is implemented at least 50%, then it will be successful. The main thing is good marketing and promotion. Without the majority of customers restaurants will not be profitable. Therefore, the main task is to ensure that as many people as possible learn about the project.
Well, I hope that the team seeks to 100% success. But this is only possible with high-quality advertising. Restaurants need to learn about the development. Otherwise, run the application may not be as active as I'd like.