A home built in 2 hours 54 minutes.

Everyone who watches ABC Extreme Make Over Home Edition marvels at the speed the new homes are built. In a week an old home is demolished, a new home constructed, decorated and landscaped. Many groups have taken this to the next level. Habitat for Humanity has a home they completed in under 4 hours. Conway Homes completed a home in 2 hours 54 minutes. See the video below.

 
To complete this it takes a team all doing their part and then some. 

• A residential designer/architect's bible is the blueprints. 
• A construction manager's schedule is the compass. 
• A contractor's crew is the engine.

Extra coordination is required between this team. For instance a residential designer/architect may produce wall stud layout plans for the contractor. The construction manager will tell stage the contractor trades start and end time in minutes rather than days. Contractors will rehearse the dance of multiple crews and trades.

Technical issues like curing time for concrete. Drying time for sheetrock mud and paint. Calculating material strength in minutes instead of days requires very high early strength concrete to support construction loads. Designing truss lift points for craning roof system on to house.

Management must identify the critical path in sequence to estimate long the project will take and where to put more workers to save time. Other tasks must keep pace with the tasks on the critical path.

Here is the 2 Hour House schedule.
 
Records and "Rules" broken with the 2Hour House process:


The rules say :                                                                        2 Hour House:

• It takes a day to set the forms, dig footings and set steel.                   8 min
• It takes a half a day to rough-in the plumbing.                                    7 min
• It takes a day to pour and finish concrete.                                        40 min
• It takes several hours to pop the lines before setting walls.                10 min
• It takes at least a day to frame the walls.                                          15 min
• It takes a day to rough-in the electrical.                                            15 min
• It takes a day to put in the wall plumbing.                                         15 min
• It takes a day to shingle the roof.                                                      30 min
• It takes a half a day to insulate the walls and attic.                             10 min
• It takes at least a day to sheetrock.                                                   15 min
• It takes at least four days to tape, bed, and texture the walls.             20 min
• It takes two days to paint.                                                                 10 min
• It takes a half a day to install the flower beds and trees.                      10 min
• It takes a day to do the final grade.                                                    10 min
• It takes a day to lay the grass.                                                            10 min
• It takes a day to set the kitchen cabinets.                                            15 min
• It takes a day to set the bathroom cabinets.                                        10 min
• It takes a day to install the heating and cooling.                                   10 min
• It takes a day to do the interior doors and base boards.                      15 min
• It takes a half a day to install the garage door.                                       3 min
• It takes a half a day to put in the countertops.                                      10 min

The 2 Hour Home website tells more about the construction management techniques to set this record.