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

["Begel, Michael" <begel AT bnl.gov>]

Does the second HTT Scope Contingency include the impact of the first one? Same comment for the Muon ones.

No - what is quoted is the additional savings that would be realized after the first option is exercise.

I should have been more clear. If we don't do both then is the impact 10% or 15% on H->bb acceptance.

Michael Begel

begel AT bnl.gov

On Tue, Jul 23, 2019 at 11:22 AM Hal Evans <hgevans AT indiana.edu> wrote:

Dear L2Ms/DL2Ms,

Please find attached an updated version of the scope
contingency/opportunity spreadsheet. After reading over the
recommendations from PDR about this topic, we realized that we have been
asked to provide a prioritization for our contingency/opportunity items.
Clearly, any prioritization that we apply now will change in the future
as the realities of the situation at ATLAS evolve. So you should not
take this too seriously. However, since we're required to do it, here's
an attempt.

The basic criteria we applied in producing the prioritization are:

1. Scope Contingency: give highest priority (i.e. these options would be
exercised first) to those items that could conceivably be recovered later.

2. Scope Opportunity: give highest priority to those items that will
need to be done, but for which no plan currently exists.

3. Exact rankings within those criteria are largely random, and in any
case these ranking do not indicate how we would actually cut/add scope
should the need/opportunity arise. That will depend on the exact
situation at the time the decision needs to be made.

Let me know if you have any questions or comments. I'll post the new
version tomorrow unless there are strong objections.

Others in the PO should chime in if there's anything important I've left
out.

Cheers  -  Hal

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 Hal Evans                        hgevans AT indiana.edu
           http://pages.iu.edu/~hgevans/
 Tel: (812)856-3828                Fax: (812)855-5533
 253 Swain Hall West               Indiana University
 727 E. Third St.               Bloomington, IN 47405
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