Method of planning works for robots and work planning device

A robot system comprising:

• robots, each of the robots having a work tool to perform work to a plurality of work parts of a workpiece;
• a plurality of stations that are different positions for the workpiece;
• a work planning device for the robots, the work planning device being configured to create a work plan for each of the robots, the work planning device comprising a processor configured to:
• calculate a distribution of the work parts to the robots based on the positions of the work parts, content of the work, and work capabilities of the robots;
• calculate, as a robot operation, a work order of the work parts and a moving path of the work tool for each of the robots based on the work distribution calculated;
• and
• calculate a disposed location of each of the robots with respect to the workpiece and a station of the plurality of stations where the robot is disposed so that an inter-robot interference does not occur during execution of the robot operation calculated, and when at least two of the robots of which the disposed locations with respect to the workpiece at least partially overlap with each other at the station, calculate the disposed location of the at least two of the robots to be a different one of the plurality of stations, wherein
• in response to the disposed location and the station being calculated for each of the robots, the robots are placed at the disposed location and the station that are calculated.