A small office building construction project requires completion of the tasks shown in this precedence diagram.

The corresponding CPM data file is as follows.

0 1 4 Form
1 2 2 Pour
2 3 14 Cure
3 4 2 Strip
3 6 8 Frame
4 5 5 Curtain walls
4 8 10 Plumbing
4 7 10 Risers
4 10 1 Doors
4 13 16 Electrical walls
4 12 3 Balance elevator fittings and frames
5 6 5 Sash glaze
6 7 5 Spray fireproof
6 13 5 Insulate wall, etc.
7 8 5 Ceiling ducts & fixtures
8 9 3 Test
9 13 3 Insulate mechanical
10 11 2 Part masonry
11 13 0 Dummy
11 12 0 Dummy
12 14 3 Finish masonry
13 14 3 Lathe
14 15 5 Plaster
14 17 3 Marble work
15 16 0 Dummy
15 17 0 Dummy
15 18 3 Tiling
18 19 0 Dummy
18 20 5 Paint (part)
19 20 5 Finish mechanical
20 21 1 Finish paint
21 22 4 Caulking & clean up