External wall

Actual duration

Plan duration

1st

24

24

2nd

13

15

3rd

12

14

4th

32

32

5th

12

13

6th

13

15

7th

42

44

8th

17

19

9th

9

9

10th

13

14

11th

9

9

12th

9

9

13th

24

25

14th

11

12

15th

12

13

16th

10

11

17th

10

10

18th

10

9

Total

282

297

Average

15.6

16.50