A method of processing holes in a work piece, the method comprising: engaging a first drill with a robotic device with the first drill being positioned at an engagement position of the robotic device; moving the first drill with the robotic device to a first position on the work piece; characterised by: disengaging the first drill from the robotic device at the first position; while the first drill is disengaged from the robotic device, drilling the work piece at the first position with the first drill; and while the first drill is disengaged from the robotic device and drilling the work piece at the first position: moving the robotic device away from the first position while the engagement position is unoccupied; engaging a second drill with the robotic device with the second drill being positioned at the engagement position; moving the second drill with the robotic device to a second position on the work piece; disengaging the second drill from the robotic device at the second position; and while the second drill is disengaged from the robotic device, drilling the work piece with the second drill at the second position. engaging a first drill with a robotic device with the first drill being positioned at an engagement position of the robotic device; moving the first drill with the robotic device to a first position on the work piece; characterised by: disengaging the first drill from the robotic device at the first position; while the first drill is disengaged from the robotic device, drilling the work piece at the first position with the first drill; and while the first drill is disengaged from the robotic device and drilling the work piece at the first position: moving the robotic device away from the first position while the engagement position is unoccupied; engaging a second drill with the robotic device with the second drill being positioned at the engagement position; moving the second drill with the robotic device to a second position on the work piece; disengaging the second drill from the robotic device at the second position; and while the second drill is disengaged from the robotic device, drilling the work piece with the second drill at the second position. while the first drill is disengaged from the robotic device, drilling the work piece at the first position with the first drill; and while the first drill is disengaged from the robotic device and drilling the work piece at the first position: moving the robotic device away from the first position while the engagement position is unoccupied; engaging a second drill with the robotic device with the second drill being positioned at the engagement position; moving the second drill with the robotic device to a second position on the work piece; disengaging the second drill from the robotic device at the second position; and while the second drill is disengaged from the robotic device, drilling the work piece with the second drill at the second position. moving the robotic device away from the first position while the engagement position is unoccupied; engaging a second drill with the robotic device with the second drill being positioned at the engagement position; moving the second drill with the robotic device to a second position on the work piece; disengaging the second drill from the robotic device at the second position; and while the second drill is disengaged from the robotic device, drilling the work piece with the second drill at the second position.