  Many choices are available in order to evaluate large radioactive decay
networks. %multi-particle decay data. There are many parameters that influence
the calculated $\beta$-decay delayed single and multi-neutron emission
branching fractions. We describe assumptions about the decay model, background,
and other parameters and their influence on $\beta$-decay delayed multi-neutron
emission analysis. An analysis technique, the ORNL BRIKEN analysis procedure,
for determining $\beta$-delayed multi-neutron branching ratios in
$\beta$-neutron precursors produced by means of heavy-ion fragmentation is
presented. The technique is based on estimating the initial activities of zero,
one, and two neutrons occurring in coincidence with an ion-implant and $\beta$
trigger. The technique allows one to extract $\beta$-delayed multi-neutron
decay branching ratios measured with the hybrid \textsuperscript{3}He BRIKEN
neutron counter. As an example, two analyses of the $\beta$-neutron emitter
\textsuperscript{77}Cu based on different {\it a priori} assumptions are
presented along with comparisons to literature values.
