Approximation of Discrete Sequential Boundaries
当决策次数和组大小未预先固定时，推导了离散序贯边界的保守临界极限，该方法仅需最后两次检验统计量的联合分布。
Conservative critical limits for discrete sequential boundaries are derived, when the number of decision times and group sizes are not fixed in advance. The method at any stage of the sequential experiment requires only the joint distribution of the test statistics at the last two inspection times.