| The sources and amounts of integrated luminosity lost due to Tile Calorimeter data quality problems in 2012 as a function of time. The primary source of luminosity losses comes from the stop-less read-out link (ROL) removal in the extended barrels accounting for 45.2\,pb$^{-1}$ of this loss. Power cuts or trips of the 200V power supplies account for 22.6\,pb$^{-1}$. The last 4.9\,pb$^{-1}$ of losses stem from Laser Calibration ROD (LASTROD) busy events. The loss of 31.3\,pb$^{-1}$ due to a $-25$\,ns timing shift in EBC are recovered after the data are reprocessed with updated timing constants. Each bin in the plot represents about two weeks of data-taking. |