Under the condition of commercial operations, time limit is not only an important index which is applied to evaluate post production quality and service level, but has also been the focus of competition on post service market. 在商业化运作的情况下,时限不再仅仅是衡量邮政产品质量与服务水平的一个重要指标,而且已成为寄递业务市场竞争的焦点。