Find out how many decimal places it handles and what happens when a country develops a new currency. Unfortunately, the Agentinian giovernment then created a new currency- 10,000 times the old one. Check into ceded reinsurance. Your company probably buys reinsurance protection to cover its book and it should be reflected, to the extent possible, in the system. The ideal system can porduce triangles either way.
Some systems do some things better than others.
Actual recommendations are welcome too.