The 'Board Skew Parameter Tool' can be downloaded using the following link:
This tool enables you to calculate the board skew parameter values required by the EMIF IP generated using the MegaWizard Plug-in Manager Tool. Go through Altera's "Agreement Policy" before downloading the tool.
This tool uses Microsoft Excel as its user interface. Enable "Macros" while using the Microsoft Excel spreadsheet to start using the tool.