Crab
If you can ignore fatigue, then age is not the issue.
Take the car example - one car 30 years old, the other 10 years, with both requiring a service every 10k miles. If the old car is only doing 5k miles a year and the newer one 20k miles, the newer car will not be available to drive on demand as often as the old one.
If you do factor in fatigue, then its down to usage. If your old car is used for Grannys Sunday shopping, whilst the newer one is used for serious off-roading (gripped). The newer one is going to fall apart first.
LITS was supposed to streamline the system but never saw it in action. ISTR it was derived by IBM from a South African system but this is the government trying to buy IT, and that has yet to work efficiently in any department.
Regards
Retard