U.S. ATLAS HL-LHC Upgrade Level 2 and Deputies-NSF only Management Mailing List

[Gustaaf Brooijmans <gusbroo AT nevis.columbia.edu>]

Hi John,

Yes, but it turns out this is all due to supply chain.  In the working 
summary sheet you’ll see I made some small annotations.  Without supply chain 
the 438/461 becomes 251/288, so ~90% CL.  We didn’t have supply chain risks 
at FDR, or at the summer 2021 annula review.

Best,

Gustaaf

> On Feb 24, 2023, at 4:48 PM, John Parsons <parsons AT nevis.columbia.edu> 
> wrote:
> 
> 
> Hi Gustaaf,
> 
>       I am surprised that @ 90%CL LAr seems to need about 200 "extra" days 
> (almost a year) beyond the float we have.  What is driving that?  We have 
> certainly made a lot of progress since FDR, and were not in such bad shape 
> back then.  We also have more base float now than we did at FDR, and yet we 
> are "under water"?
> 
>               John
> 
> On 2/24/23 4:39 PM, Gustaaf Brooijmans wrote:
>> Hello all,
>> We think we’ve worked the kinks out of all the numbers.  In the attached 
>> you will find a for presentation tab, as well as a working tab with a bit 
>> more info on floats, and all the detailed info.  Let us know if you see 
>> something weird.  The for presentation tab calculates % contingency on the 
>> cost-to-go, which gives a better idea of where we are.
>> Best,
>> Chris and Gustaaf
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> 
> -- 
> ______________________________________________________________________
> 
> John Parsons
> Nevis Labs,           Email: parsons AT nevis.columbia.edu
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