In the case of vertical walls columns and beams, the tolerance in deviation of formwork is (+/—) 5 mm per 2.5 m and as a whole structure, it should not be more than 10 mm.
The meaning of this statement is that verticality can be allowed to deviate by 5 mm per 2.5 m lift and the total deviation measuring from top-up to the base of column or wall should not in any case deviate more than 10mm.