deletions | additions       diff --git a/sectionCURRENT_STATU.tex b/sectionCURRENT_STATU.tex  index 3982c1e..1e1dfe6 100644  --- a/sectionCURRENT_STATU.tex  +++ b/sectionCURRENT_STATU.tex 
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The definition of beam availability is important in order to compare numbers from different facilities.   A survey on failure analysis in 2008 for nine light sources~\footnote{Survey participants for the failure analysis questionnaire came from: APS, ESRF, SPring-8, Diamond, SOLEIL, BESSY II, Elettra, ANKA and SLS.} revealed significant differences for the calculation of beam availability~\cite{L_deke_2009}.  In the following we summarise the main findings of the survey.  In many cases the beam availability calculations were determined by identifying events as ``downtime'' that interrupted the majority of the users.   Some facilities considered ``long'' injector outages - causing ``decaying beam'' operation - to be downtime, others accounted for these events individually.  Most facilities only counted beam delivery between two outages if it exceeded a minimum duration.  
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If a particular failure mode is identified to be more frequent at some facilities,   then this provides an incentive for a common project to develop more reliable solutions.   As a consequence of everyone using the same common metrics, a fairer comparison may also  emerge when requesting funding to supranational authorities.