SAM availability: Monthly summary table

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SAM Monthly Availability for GridPP sites - 2007

The table below shows the average availability of each GridPP site on a monthly basis since June 2007. The availability figure is the average of the daily figures from a month where the daily figures are based on SAM results from midnight to midnight of each day. The target availability is based on ideas put forward at (and subsequent disscussion at) the GridPP18 collaboration meeting.


File:Monthly availability table 1.4.JPG


For a view of the variation in availability over the June and July period, together with site explanations of the issues affecting their availability, please see SAM_availability:_July-September_2007.


There have been questions about whether there is any obvious correlation between funded and unfunded effort at a site versus the performance of that site in the SAM tests. The funded and unfunded ratios are being reviewed, but in the meantime here is an example of a scatter plot based on the estimated total effort at each site. This relies on the manpower figures given in the Tier-2 quarterly reports and assumes that the Tier-2 coordinator effort is distributed evenly across the GridPP sites within the respective Tier-2. The efficiency is the average in the period June to October.

File:Manpower scatter.JPG