As I now live in Rwanda I had to go through a similar process to obtain a working visa in the country. Clearly the number of working visa applications in Rwanda cannot be compared with the number of green card applications in the US, however I'd like to share with you how it happened.
When I provided all the required documents at the immigration services of Rwanda, they provided me with an ID number that I could use to track the progress of my application online. But even better, when my visa was ready I received an SMS on my mobile phone saying so as you can see on the next screen shots.
Many businesses here have integrated SMS functions in their customer services. As a customer you can choose to get that service or not.
See ya later alligator...