A **device** is an object owned by a **guest** which has some issue. To get support for fixing the issue, a **guest** provides the information about the **device** and requests a repair **appointment** during a **repair_cafe**.
A **repair_cafe** happens at a specific date and location. It's an event which consists of **appointments** of **repairers** with **guests** to fix a **device**.
In case of ambiguities, a **organizer** or a **repairer** can raise a **consultation** request. This **consultation** request is sent to the **guest** to get the needed information. In addition, a **organizer** or a **repairer** can add an **comment** to a **device**.
A **repair_cafe** is a event happening at a specific date at a specific location. During a **repair_cafe****appointments** of **guests** with **repairers** happens to fix broken *devices*.