Originally Posted by
Maus92
One could reasonably wonder why if the AV-8B and MV-22 had known issues with thermal stress on deck (and under deck) structures, why did the America Class require such an extensive redesign (and yard period) to accommodate the F-35B? It cost hundreds of millions of dollars to modify and refit the LHA-6 and the USS Wasp, and millions more will be spent modify the follow-on LHA-7, and refit other amphibs (LHA-8 will have the mods incorporated into its build.) These are not limited to mechanical structures: electrical systems, mx departments, space for ALIS, etc. - all need modification. I think it's reasonable to assume that A wasn't talking to B, and the thermal and mechanical loads that the F-35B imparts on underlying structures is much greater than anticipated.
I don't think that's a reasonable assumption at all. From my experience, it's easier - and cheaper - to execute a contract to the agreed build state, then let a new contract once the first is complete. That gives time for the scope of the changes to become apparent and a detailed statement of work to be written.
Otherwise you risk trying to negotiate some amorphous engineering change proposal under a contract change proposal. It becomes sole source and isn't negotiated in a competitive environment. Not a good thing for cost & schedule.
The USS America refit looks like pretty sound project management.