System and method for controlling work machine

A method performed by a controller for controlling a work machine including a work implement, the method comprising:

• acquiring a position of an excavation end by the work machine, a target soil amount, and an excavation distance;
• determining a target excavation depth of a first pass based on the position of the excavation end, the target soil amount, and the excavation distance;
• executing an excavation of the first pass by moving the work implement to the target excavation depth of the first pass;
• acquiring an actual soil amount excavated in the first pass;
• modifying the target soil amount based on the actual soil amount;
• determining the target excavation depth of a second pass based on the modified target soil amount;
• and
• executing the excavation of the second pass by moving the work implement to the target excavation depth of the second pass.

A system for controlling a work machine including a work implement, the system comprising:

• a controller configured to
• acquire a position of an excavation end by the work machine, a target soil amount, and an excavation distance,
• determine a target excavation depth of a pass based on the position of the excavation end, the target soil amount, and the excavation distance, and
• move the work implement to the target excavation depth of the pass to execute an excavation of the pass.