function getSearchOptionsStats()
{
$tab = array();
$tab['stats'] = __('Statistics');
$tab[154]['table'] = $this->getTable();
$tab[154]['field'] = 'solve_delay_stat';
$tab[154]['name'] = __('Resolution time');
$tab[154]['datatype'] = 'timestamp';
$tab[154]['forcegroupby'] = true;
$tab[154]['massiveaction'] = false;
$tab[152]['table'] = $this->getTable();
$tab[152]['field'] = 'close_delay_stat';
$tab[152]['name'] = __('Closing time');
$tab[152]['datatype'] = 'timestamp';
$tab[152]['forcegroupby'] = true;
$tab[152]['massiveaction'] = false;
$tab[153]['table'] = $this->getTable();
$tab[153]['field'] = 'waiting_duration';
$tab[153]['name'] = __('Waiting time');
$tab[153]['datatype'] = 'timestamp';
$tab[153]['forcegroupby'] = true;
$tab[153]['massiveaction'] = false;
return $tab;
}