Order set of the order picking problem

The order set file includes the arrival time and the detailed ordered items for a timeframe of 60 days with 4000 customer orders, in a online-to-offline grocery. The arrival time is 0~750. The number of items is 1200. The value is 1 if the item is ordered, otherwise 0.

本订单集文件涵盖了线上到线下（online-to-offline）杂货零售场景下，60天时间跨度内的4000条客户订单的下单时间与详细订购商品明细。其中，订单到达时间的取值范围为0~750，该数据集涉及的商品品类总数为1200种；数据采用二值编码规则：若某商品被订购则取值为1，未被订购则取值为0。