The second part of the formula deals with availability of visitor slots.
For example, a city of 80,000 population should have 10,000 commercial workers. The ideal balance is to achieve a ratio of 1 commercial worker (a citizen that works in a commercial building) to 8 citizens. The first part of the formula deals with the ratio of commercial workers to total citizen population. Commercial (Blue) - this meter follows a more complex formula.
A 50% full meter indicates a good balance of workers to jobs available. A high meter indicates lots of demand for new workers, while a low meter suggests that there is an oversupply of workers. This includes worker demand from Industrial Buildings in the Cities Skylines: Industries and other game expansions. Residential (Green) - this meter reflects the demand for workers from all Commercial, Industrial and Office zones or buildings.
The RCI meter will change in value according to the following rules: However, you may need to upset the balance to grow a city. A perfectly balanced city will have each RCI meter filled half way to a value of 0. The value of each RCI meter extends from -50 to +50.
The RCI meter can be viewed in the user interface.