There were capable of doing 31 million of installation in quarter 2 yet could only do 17.6 and 18.5 respectively in quarters 3 and 4, with 43.5 million on the books.
Maybe the jobs in quarter 2 were large jobs, while quarter 3 and 4 were smaller. Which would mean a lot more non productive time because of more travel, more set ups and more clean ups would be required.