deletions | additions       diff --git a/abstract.tex b/abstract.tex  index 4c077f8..455b7d8 100644  --- a/abstract.tex  +++ b/abstract.tex 
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Storage ring light sources aim fora  high operation operational  reliability. Very often beam availability is used as an operation metrics metric  to measure the reliability of the accelerator. reliability.  A survey of several light sources revealed reveals  that the calculation of availability varies significantly between facilities. This prevents a complicates  useful comparison comparisons  of reliability. Furthermore the beam availability does not provide inside about the insight regarding  reliability of beam characteristics like such as  orbit- or and  beam size stability. The authors proposea  specific metrics to evaluate the reliability of storage ring light sources; a these  metricsthat will  allowa  detailed and meaningful comparison across facilities. The authors Such comparisons  areconvinced that  such a comparison will be  useful to further optimize the reliability of storage ring light sources. source facilities.