Abstract: The work state identifying unit identifies a work state of a work machine disposed in a construction site at each time point and a work state of a transport vehicle traveling at the construction site at each time point. The time chart generation unit that generates a time chart representing the work state of the work machine at each time point and a time chart representing the work state of the transport vehicle at each time point on the basis of the identified work states. The output control unit that outputs the time charts on an identical screen with a time axis as a common axis.

Abstract: A work state identifying unit identifies work states of a work machine. A parameter identifying unit identifies a parameter related to a work amount per unit time of the work machine or a parameter related to a speed of the work machine for each of the identified work states on the basis of a time series of position data, azimuth data, or speed data of the work machine.

Abstract: The work state identifying unit identifies a work state of a work machine disposed in a construction site at each time point and a work state of a transport vehicle traveling at the construction site at each time point. The time chart generation unit that generates a time chart representing the work state of the work machine at each time point and a time chart representing the work state of the transport vehicle at each time point on the basis of the identified work states. The output control unit that outputs the time charts on an identical screen with a time axis as a common axis.

Abstract: A work state identifying unit identifies work states of a work machine. A parameter identifying unit identifies a parameter related to a work amount per unit time of the work machine or a parameter related to a speed of the work machine for each of the identified work states on the basis of a time series of position data, azimuth data, or speed data of the work machine.