Reducing from 3 to 2 Fleet groups - no saving...?

[ACDennison]

In DotM I recently went down to two fleet groups, ATRs and BAC 1-11's, having previously operated the BAe ATP as well.  However, I have not seen any notable reduction is commonality and/or staff training costs... slightly worried, I had partly made the change based on the fact I should achieve a commonality saving.  Aslo, in a few months I am getting a new 3rd type, and I'm worried this will add to my costs as if it were a 4th type.   Can anyone shed any light on all this?

For the record I have ~70 aircraft in each of my fleet groups.  If no-one knows anything, or everyone thinks I should have seen a reduction, this may be a bug - but I don't want to assume it is yet.  If sami is around and has a look I won't mind though!

[Sigma]

There is no appreciable, if any, penalty up to 3 fleets.

[SACEO]

There is no appreciable, if any, penalty up to 3 fleets.

I wonder if it has to do with operating different size-classes, because I was operating three fleet types ... 1 large and 2 very large fleet types.  I dumped the second very-large fleet type and immediately saw the commonality costs for both my remaining fleet types cut almost precisely in half.  Dunno, but the numbers don't lie.

[Mr. Pete]

Had same thing. After adding 3rd group my fleet costs rised 100%.

[GEnx]

The key is scale. If you have, say 2 B747-200's, 2 B737-200's and 1 BAC 1-11, then your commonality costs are relatively high compared to your revenue. When you get to the fourth fleet group, that's where things get extremely crude.

[ACDennison]

Yeah - I remeber my costs doubling when I added the thrid fleet group... I'm wondering if growing the other fleet groups substantially actually brought that increase progressivly down, such that on scrapping the third group I don't notice a saving... bit of a pain, had ben hoping to save some $ on commonality.  Still, maybe that means my new third group won't cause a jump in costs - if it does I'm gonna be in trouble or at least struggling for a while... have to wait and see .

Anyone else care to chip in?