Factor	Frequency of visualization of the factor at the worksite
Factor	Always	Often	Sometimes	Seldom	Never
Accurate estimate of the volume of concrete to be used		X
Equal portions to concrete	X
Well-structured molds	X
Existence of control in the amount of concrete received	X
Big concretings		X
Pump does not retain concrete	X
Use of remaining concrete on the transport element		X
Request of remaining concrete consistent with the progress of concreting		X
Utilization of tools needed to control the level of concrete	X
There is no remaining concrete in the molds			X
Area of regular access	X
Little vibration of concrete in transportation	X
The thickness of the slab is not increased	X
Height of free fall of the concrete is less than 2 meters	X
Good operating of the elements of concrete transport	X
Encouragement of workers to minimize wastes					X