  In this paper, we report on the construction of a new and independent
pipeline for analyzing the public data from the first observing run of advanced
LIGO for mergers of compact binary systems. The pipeline incorporates different
techniques and makes independent implementation choices in all its stages
including the search design, the method to construct template banks, the
automatic routines to detect bad data segments ("glitches") and to insulate
good data from them, the procedure to account for the non-stationary nature of
the detector noise, the signal-quality vetoes at the single-detector level and
the methods to combine results from multiple detectors. Our pipeline enabled us
to identify a new binary black-hole merger GW151216 in the public LIGO data.
This paper serves as a bird's eye view of the pipeline's important stages. Full
details and derivations underlying the various stages will appear in
accompanying papers.
