Reporting Wheel

A reporting wheel is a device used to report structured information in a very intuitive and user-friendly way: the user just have to send a number. A double-entry table might be such a device:

Here, to report 2 cases of cholera the user will have to report "0514". Numbers are easy to report using a mobile phone, whether the user needs to type it in an sms or when talking to a machine.

But the most common Reporting Wheel is a wheel with three discs: on one side you specify the reported information and on the right side the code you need to send. You choose the information by rotating each of the discs.

So for example a user reports "0514" to an sms number. This message is forwarded to the API and the response will be "disease:cholera, amount:2".