Whenever a choice from a list of known values required, use a choice indicator in SERAM.

Each item which can be picked is associated to a numeric value, which can be used directly or indirectly for forther computation. For instance, you could have a list of coolants and store their CO2 equivalence as number, so that you can compute the CO2 equivalent emissions by a simple multiplication with the amount of lost coolant.

Unlike booleans, the choice indicators cannot be consolidated directly.