Development and Productive Mode
Flow scripts on the Engine platform can be executed in either development or productive mode. The development mode in Engine is intended to make it easier for you to develop flow scripts.
Concept
Connections in the development mode are free of charge. This means that you can experiment and play around with as many flow scripts and as many connections as you like in development mode.
You can switch executions which you have started in development mode into productive mode. This allows you to test your flow scripts and put them into production directly once you are happy with them. Executions in productive mode count towards your monthly productive connections.