House Construction Product
Data on activity network Parameters of PERT distributions Event times
Activity Code Numeric index Predecessors Min Most likely Max Implied mean Duration[1] Duration+[2] Node Event time[3] Event time+[4]
Plans A 1 None 1.7 2 2.8 2.083 2.083 2.084 1 0 0
Site Plan Survey B 2 A 3.4 4 5.6 4.167 4.167 4.167 2 2.083 2.084 Plans
Permits C 3 B 3.4 4 5.6 4.167 4.167 4.167 3 6.250 6.251 Site Survey
Site Work/Tree Removal D 4 C 8.5 10 14 10.417 10.417 10.417 4 10.417 10.418 Permits
Foundation E 5 D 5.95 7 9.8 7.292 7.292 7.292 5 20.833 20.834 Site Work
Plumbing - Slab F 6 E  2.55 3 4.2 3.125 3.125 3.125 6 28.125 28.126 Foundation
Survey - Foundation G 7 E 3.4 4 5.6 4.167 4.167 4.167 7 32.292 32.293 Slab, Survey, Water
Waterproofing H 8 E 0.85 1 1.4 1.042 1.042 1.042 8 34.375 34.376 Grade-Backfill
Grading Backfill I 9 F,G,H 1.7 2 2.8 2.083 2.083 2.083 9 35.417 35.418 Gravel Basement
Gravel Basement J 10 I 0.85 1 1.4 1.042 1.042 1.042 10 36.458 36.459 Termite
Termite Protection K 11 J 0.85 1 1.4 1.042 1.042 1.042 11 39.583 39.584 Basement Slab
Basement Slab L 12 K 2.55 3 4.2 3.125 3.125 3.125 12 50.000 50.001 Frame
Framing M 13 L 8.5 10 14 10.417 10.417 10.417 13 51.042 51.043 Fireplace Rough
Fireplace- Rough N 14 M 0.85 1 1.4 1.042 1.042 1.042 14 52.083 52.084 Roof  
Roofing/Shingles P 16 M 1.7 2 2.8 2.083 2.083 2.083 15 54.167 54.168 Plumb
Plumbing- Rough O 15 P 3.4 4 5.6 4.167 4.167 4.167 16 54.167 54.168 Windows
HVAC - Rough Q 17 N,O 4.25 5 7 5.208 5.208 5.208 17 57.292 57.293 Exterior Trim
Exterior Trim/Siding R 18 P  4.25 5 7 5.208 5.208 5.208 18 58.333 58.334 Steel
Windows & Doors S 19 P 1.7 2 2.8 2.083 2.083 2.083 19 58.333 58.334 Prime Exterior
Steel-Brick T 20 R,S 0.85 1 1.4 1.042 1.042 1.042 20 59.375 59.376 HVAC
Electrical - Rough U 21 Q 2.55 3 4.2 3.125 3.125 3.125 21 62.500 62.501 Electrical
Prime Exterior V 22 R,S 0.85 1 1.4 1.042 1.042 1.042 22 63.542 63.543 Security Rough
Masonry W 23 T,V 8.5 10 14 10.417 10.417 10.417 23 64.583 64.584 Insulation
Security - Rough IN X 24 U 0.85 1 1.4 1.042 1.042 1.042 24 68.750 68.751 Masonry
General Site Cleanup Y 25 CC 0.85 1 1.4 1.042 1.042 1.042 25 69.792 69.793 Brick Clean
Insulation - Batts Z 26 X 0.85 1 1.4 1.042 1.042 1.042 26 70.833 70.834 Site Clean up
Septic Tank/Sewer Line AA 27 Y 2.55 3 4.2 3.125 3.125 3.125 27 70.833 70.834 Roof Flash
Utility Connections BB 28 AA 4.25 5 7 5.208 5.208 5.208 28 70.833 70.834 Shutters
Brick Clean CC 29 W 0.85 1 1.4 1.042 1.042 1.042 29 73.958 73.959 Sewer
Drywall DD 30 W,Z 6.8 8 11.2 8.333 8.333 8.333 30 75.000 75.001 Water
Water Line EE 31 AA 0.85 1 1.4 1.042 1.042 1.042 31 79.167 79.168 Drywall
Roofing - Brick Flashing FF 32 CC 0.85 1 1.4 1.042 1.042 1.042 32 79.167 79.168 Utilities
Shutters GG 33 CC 0.85 1 1.4 1.042 1.042 1.042 33 80.208 80.209 Fireplace-F
Grading - Final HH 34 EE 1.7 2 2.8 2.083 2.083 2.083 34 81.250 81.251 Grade Final
Driveway II 35 HH 4.25 5 7 5.208 5.208 5.208 35 82.292 82.293 Hardwood-F
Guttering JJ 36 II 1.7 2 2.8 2.083 2.083 2.083 36 83.333 83.334 Cabinets
Deck KK 37 II 0.85 1 1.4 1.042 1.042 1.042 37 84.375 84.376 Cultured Marble Tops
Wrought Iron Railing LL 38 II 0.85 1 1.4 1.042 1.042 1.042 38 86.458 86.459 Driveway
Fireplace -Final MM 39 DD 0.85 1 1.4 1.042 1.042 1.042 39 87.500 87.501 Deck
Hardwood Flooring - Rough NN 40 MM 1.7 2 2.8 2.083 2.083 2.083 40 87.500 87.501 Wrought Iron Rail
Cabinets & Vanities OO 41 NN 0.85 1 1.4 1.042 1.042 1.042 41 88.542 88.543 Interior Trim
Interior Trim PP 42 OO 4.25 5 7 5.208 5.208 5.208 42 88.542 88.543 Gutters
Cultured Marble Tops QQ 43 OO 0.85 1 1.4 1.042 1.042 1.042 43 89.583 89.584 Garage Doors
Ceramic Tile RR 44 PP,QQ 1.7 2 2.8 2.083 2.083 2.083 44 90.625 90.626 Ceramic Tile
Garage Doors SS 45 PP 0.85 1 1.4 1.042 1.042 1.042 45 91.667 91.668 Painting Exterior
Painting - Exterior TT 46 JJ,LL,SS 1.7 2 2.8 2.083 2.083 2.083 46 95.833 95.834 Paint Interior
Painting - Interior UU 47 RR,SS 4.25 5 7 5.208 5.208 5.208 47 96.875 96.876 Hardware Interior
HVAC - Final VV 48 UU 1.7 2 2.8 2.083 2.083 2.083 48 97.917 97.918 HVAC Final
Hardware - Interior WW 49 UU 0.85 1 1.4 1.042 1.042 1.042 49 97.917 97.918 Plumbing Final
Clean - Windows XX 50 TT,WW 0.85 1 1.4 1.042 1.042 1.042 50 98.958 98.959 Appliances
Plumbing - Final YY 51 UU 1.7 2 2.8 2.083 2.083 2.083 51 98.958 98.959 Light Fixtures
Appliances ZZ 52 VV,WW 0.85 1 1.4 1.042 1.042 1.042 52 99.917 99.918 Clean Windows
Light Fixtures AAA 53 VV,WW 0.85 1 1.4 1.042 1.042 1.042 53 102.083 102.084 Electrical Final
Electrical - Final BBB 54 VV,WW,ZZ,AAA 2.55 3 4.2 3.125 3.125 3.125 54 103.125 103.126 Insulation Blown
Security - Final CCC 55 BBB 0.85 1 1.4 1.042 1.042 1.042 55 103.125 103.126 Security-Final
Insulation - Blown DDD 56 BBB 0.85 1 1.4 1.042 1.042 1.042 56 104.167 104.168 Wallpaper
Landscaping EEE 57 KK,BBB 2.55 3 4.2 3.125 3.125 3.125 57 105.208 105.209 Landscaping
Survey - Final FFF 58 EEE 0.85 1 1.4 1.042 1.042 1.042 58 106.250 106.251 Survey Final
Wallpaper GGG 59 BBB 1.7 2 2.8 2.083 2.083 2.083 59 106.250 106.251 Power Wash
Hardwood Flooring - Final HHH 60 CCC,DDD,EEE,GGG 3.4 4 5.6 4.167 4.167 4.167 60 109.375 109.376 Hardwood-Final
Mirrors III 61 HHH 0.85 1 1.4 1.042 1.042 1.042 61 110.417 110.418 Mirrors, Shower Door
Shower Enclosures JJJ 62 HHH 0.85 1 1.4 1.042 1.042 1.042 62 111.458 111.459 Carpet, Vinyl
Flooring - Carpet KKK 63 III,JJJ 0.85 1 1.4 1.042 1.042 1.042 63 112.500 112.501 Trim Punch Outs
Flooring - Vinyl LLL 64 III,JJJ 0.85 1 1.4 1.042 1.042 1.042 64 113.542 113.543 Clean-Pre-Final
Trim - Punch Outs MMM 66 KKK,LLL 0.85 1 1.4 1.042 1.042 1.042 65 116.667 116.668 Paint-Touch Ups
Cleanup - Pre-Final NNN 65 MMM 0.85 1 1.4 1.042 1.042 1.042 66 117.708 117.709 Clean Final
Paint - Touch Ups OOO 67 NNN 2.55 3 4.2 3.125 3.125 3.125 67 122.917 122.918 Punch list Items
Power Wash Exterior PPP 68 EEE 0.85 1 1.4 1.042 1.042 1.042
Clean - Final QQQ 69 OOO,PPP 0.85 1 1.4 1.042 1.042 1.042
Punch List Items RRR 70 QQQ 4.25 5 7 5.208 5.208 5.208
Index of activity to increase[5] 1.000
Increase in project time?[6] 1

[1]
Patrick Dotson:
Generate random activity times
[2]
Patrick Dotson:
Checking to see whether the activity is critical
[3]
Patrick Dotson:
Calculates the node event times
[4]
Patrick Dotson:
Calculates the event times when the selected activity's time is augmented by 0.001
[5]
Patrick Dotson:
Add a small amount of time to each activity to determine whether or not it is on the critical path
[6]
Patrick Dotson:
This checks to see whether the selected activity's increased the time of the project. If this calculates to one, then the activity id critical.