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\subsubsection{TDC0}  Every prospective good team is invited to download the $N$ TDC0 pairs of light curves and analyze them. Upon completion of the analysis, the time delays estimates together with the estimated 68\% uncertainties will be uploaded to a designated web site. The simulation team will calculate four standard metrics given a set of estimated time delays $\tilde{\Delta t}$ and uncertainties $\delta \tilde{\Delta t}$. $\sigma$.  The first one is robustness, quantified as the fraction of light curves $f$ for which an estimate is obtained. The second one is the goodness of fit of the estimates, quantified by the standard $\chi^2$ \begin{equation}  \chi^2=\sum_i \left(\frac{\tilde{\Delta t}_i - \Delta t_i}{\delta \tilde{\Delta t}_i}\right)^2 t_i}{\sigma_i}\right)^2  \end{equation}  The third metric is the precision of the estimator, quantified by the average relative uncertainties  \begin{equation}  P=\frac{1}{fN}\sum_i \left(\frac{\delta\tilde{\Delta_t}}{\Delta t}\right) \left(\frac{\delta\tilde{\Deltat}_i}{\Delta t_i}\right)  \end{equation}  The fourth is the accuracy of the estimator, quantified by the average fractional residuals  \begin{equation}  A=\frac{1}{fN}\left|\sum_i \left(\frac{\tilde{\Delta t}_i - \Delta t_i}{\Delta t}\right)\right| t_i}\right)\right|  \end{equation}  The initial function of these metrics is to define a minimal performance threshold that must be passed, in order to guarantee meaningful results in TDC1. To pass TDC0, an analysis team's results must satisfy the following criteria.