Ann oil and gas use case example is what we call manual data entry.
We may have systems that are not actually on scada, but an operator rides around the field and enters data into an app at each of the sites that has equipment with no scada connection. He may take down things like tank levels, flowrates, pressures, etc. In alot of these fields, the cellular connection is spotty, so many of these apps have offline storage and then when the device gets a good signal, the data gets uploaded.