Tool Category Project Planning

Hour estimates go wrong in a consistent direction: people price the visible work and forget the invisible work. Rolling a wall or laying a floor is the part you can picture, so it is the part that gets estimated, and…

A trade says the room will take eighteen working days. Two weeks later you are still sleeping in the spare room and nobody has done anything wrong — because eighteen working days is not eighteen days. It is three and…

The volume of material you need to move is not the volume you dug, because soil swells when it is excavated. A cubic metre of undisturbed clay becomes about 1.25 cubic metres of loose spoil in a trailer, and more…