See IdeSTATİK Help file.... Calculation reinforcement tolerance (%): It is the percentage that determines how much the selected reinforcement can be selected while selecting the reinforcement. For example, if a 2% tolerance is entered for a section that requires 100 cm2 reinforcement, it means that 98 cm2 reinforcement can be selected. The tolerance can be up to 5%. For example, if the tolerance is 0%, the selected reinforcement will always be more than 100 cm2. The tolerance value entered here may cause less reinforcement to be placed in the section than necessary. Therefore, when entering a non-zero value in this line, it should be taken into account that less reinforcement will be placed in the section than necessary. Section control tolerance (%) : Determines how much tolerance the section verification will be made while performing section verification. For example, in the control of shear force in beams, let 100 tons be the upper limit. Let the beam shear force be 102 tons. For example, if 3% tolerance is entered in this line, the shear force will be 102-102*0.03= 98.94 tons. In this case, the program will not give the message that the cross section is insufficient since the beam's upper limit is 100 tons. On the other hand, if the tolerance is left at 0%, the section will be insufficient. The tolerance value entered here can save sections that did not save. Therefore, it should be taken into account that when entering a non-zero value in this line, it will remain in the unsafe direction. The tolerance can be up to 5%. As it can be understood from the explanation, it is foreseen that it can be used mostly in investigations in general, and it is thought that tolerance can be given considering the small limit values and the wide range in engineering acceptances.