Index: /trunk/doc/release.2015/ps1.datasystem/datasystem.tex
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--- /trunk/doc/release.2015/ps1.datasystem/datasystem.tex	(revision 41203)
+++ /trunk/doc/release.2015/ps1.datasystem/datasystem.tex	(revision 41204)
@@ -1101,4 +1101,40 @@
 eventual public released.
 
+\subsection{Processing Failure Rates}
+
+Table~\ref{tab:failure_rates} lists the unrecoverable failure rates
+for several of the major IPP stages for both the regular nightly
+processing and the PV3 analysis of the $3\pi$ dataset.  The table
+gives the rate per 100,000 of the item processed.  In the case of the
+\ippstage{camera} stage, the items correspond to complete exposures,
+while for \ippstage{chip} and \ippstage{warp}, the items correspond to
+individual chips and skycells, respectively.  For \ippstage{stack},
+items are the full stack.  For the \ippstage{camera} stage, the entire
+exposure fails only in extreme cases.  The astrometric calibration of
+individual chips may fail if there are not enough stars in the image,
+but the rest of the exposure may then still succeed.
+
+For the warp analysis, the apparent high failure rate is an artifact
+of two features.  First, 
+
+
+\begin{table*}
+\begin{center}
+\caption{Processing Failure Rates per 100,000 Items\label{tab:failure_rates}}
+\begin{tabular}{lll}
+\hline
+\hline
+{\bf Stage} & {\bf Nightly Processing} & {\bf $3\pi$ PV3} \\
+\hline
+Chip & 48 & 34 \\
+Camera & 262 & 280 \\
+Chip Astrometry & N/A & 307 \\
+Warp & 14244 & 13835 \\
+Stack & N/A & 5 \\
+\hline
+\end{tabular}
+\end{center}
+\end{table}
+
 \begin{table*}
 \begin{center}