Abstract: An assay device and an assay method are each capable of ensuring the accuracy of a target substance detection section.

Abstract: A working time period grasping system includes: an input unit having a start button for a worker to input start of a product manufacturing work and a completion button for the worker to input completion of the product manufacturing work; and a time period detection unit for detecting a working time period of the product manufacturing work based on information input from the input unit.

Abstract: An order reception management server creates order information in accordance with an order placed by a customer. A production management server requests a manufacturer to manufacture parts or products to be shipped in accordance with the order information and issues an order for packing boxes, in which the parts or products are packed, to a packing box manufacturer. As the parts or products are delivered from the manufacturer, a packing instruction creating unit outputs a packing instruction sheet, which gives instructions on how the parts or products are to be packed. Following the instructions of the instruction sheet, a worker carries out packing work and notifies a packing and shipping management server of the result of the packing work.