Due to a problem in the Quartus® II software version 14.0 and earlier, you may find that ECO changes to the D3 Delay Chain 1 are not implemented correctly. The change does not take effect and no difference is seen in the timing netlist or in hardware.
This problem affects Arria® V and Cyclone® V devices.
To work around this problem, do not use the ECO flow to modify the D3 Delay Chain 1 setting.
You can set the D3 Delay chain 1 value by using the D3_DELAY assignment and recompiling the design.
This problem is scheduled to be fixed in a future release of the Quartus II software.