I've implemented credit ratings for airlines now. This was required for aircraft leasing, which is the next feature I want to work on. Credit ratings are derived from your airline's debt to asset ratio, which is a representation of total liabilities/total assets.
You can view a spreadsheet to calculate your airline's credit rating here: https://docs.google.com/spreadsheets/d/1...sp=sharing
AAA
AA+
A+
A
A-
BBB+
BB+
B+
B
B-
CCC+
CC
C
(Is that too many...? I feel like it may need to be simpler). Right now the calculation for debt to asset ratio is rather simple:
Liabilities = owed payments on new aircraft
Assets = current market value of your owned fleet + cash
Ratio = (Liabilities/Assets)
That formula is still in it's infancy. In real life credit ratings take into account more than just the debt to asset ratio. I'll have to do a bit of research and see what else is involved and then add it to the formula.
You can view a spreadsheet to calculate your airline's credit rating here: https://docs.google.com/spreadsheets/d/1...sp=sharing
AAA
AA+
A+
A
A-
BBB+
BB+
B+
B
B-
CCC+
CC
C
(Is that too many...? I feel like it may need to be simpler). Right now the calculation for debt to asset ratio is rather simple:
Liabilities = owed payments on new aircraft
Assets = current market value of your owned fleet + cash
Ratio = (Liabilities/Assets)
That formula is still in it's infancy. In real life credit ratings take into account more than just the debt to asset ratio. I'll have to do a bit of research and see what else is involved and then add it to the formula.
I am the developer of Airline Enterprise