Venerable guru, ACKkkk
I will have you know my walker is still at the dealers!!
This is a new question, first time I have seen it. I'll bet ArkSea Jumper would have some excellent thoughts on this topic.
All the good engineers I deal with have a common attribute: they want a perfect ship and they want all the goodies to make it perfect. Then they hoard the goodies.
For instance a Chief goes back on a ship after 10 years, reviews the records and says I need 5 heads for the SSGs because they have a record of cracking. That is about $130,000. However the problem is not the generators but the fact they had had water in the fuel and this cracked the injectors and then the injector pocket. If the FOP is working correctly and the day tank drained, then they have no head problems. Now, conceivably, we have 5 heads stored on the ship in nooks and crannies, subjected to whatever handling the crew gives them, rough weather and dampness. They could be useless by the time it comes to use them or, which happens more, the knowledge is lost that they are onboard and more heads are ordered. They are not available to other ships of the fleet with the same model engine.
If you multiply this thinking across a fleet of ships, this is a huge investment in sparing.
Now I'm going to go off into fantasy: if the ship engineers are running a good predictive maintenace and preventative maintenace program, they will be able to schedule maintenace and bring in parts. Good predictive maintenance reports allow for extension in surveys ( anyone can correct me here, our ships are not delegated to class, so this may not be true )
The other thought I had, was less weight carrried in stores, the more room for cargo and the more money made on a voyage. The beancounters don't actually have to sail on the ship after all and it is all about profit! Can you imagine the lobbying to Class to get minimum sparing onboard!!
The other thing is you move the Supply Chain Management off of the ship into the office. We all know in this day and age, the Chiefs and Captains are swamped with ISM, ISPS and whatever other new policies come up. With minimum manning, there is no one to deal with the sparing onboard and it would not take long to be in disarray and no one have a handle on it at all.
Saying all that, we had a Zim ship come in here around Christmas. They had taken on bad fuel their last port of call and had severely worn all of the liners and piston rings in the main engine. A local company had been called in to work on the engine, they honed the liners and installed new rings, but it was a temporay fix-all 6 liners had to be replaced and there was only one available in Portugal. Large engine spares have a huge lead time in ordering. If the companies supply chain had not foreseen that they could not get parts in for 18 months or so and not taken steps to minimize the problem, then the ship is out of service
(or would it, Class does not give me a warm fuzzy feeling and it appalls me that TC has handed their mandate off to them)
Just some random thoughts. I'm glad the Examiner isn't reading this
I will tell you though, I am glad I didn't get 3 'bank letters' in my exam.