"realistic basis" is correct and usable in written English.
You can use it whenever you are describing something that has a foundation in reality or is practical. For example, "Organizing a successful summit requires a realistic basis to ensure that the final product is both feasible and meaningful."
"But these fears lack a realistic basis".
The president has been clear in stating what he believes is a realistic basis for successful negotiations, and we will continue to base our efforts on that approach".
By Tucker and Russell Maloney The New Yorker, March 16, 1940 P. 25 The New Deal has turned the corner at last, and is now established on a realistic basis.
Swindon council said of the cut in libraries spending that "while such a reduction is dramatic, it is felt to be a realistic basis on which to plan for a future service, as part of an overall approach to community-based services".
Yesterday Mr Blair dug in his heels on the rebate: "We are happy to have this discussion but it has got to be on a realistic basis and it cannot be on the basis that ignore the reasons that gave rise to the existence of the rebate".
By this path, Israel could repair the alliances that it painstakingly built in the Muslim world after Oslo, without surrendering its negotiating position; relieve pressure on itself as Arab revolutions progress; and reinforce the Palestinian Authority's credibility within the 1967 borders, which are the only realistic basis for peace.
In an interview with al-Jazeera TV, Mr Mursi said it had been developed on "a scientific and realistic, practical basis" and that "within the Brotherhood we all own this project, not any particular individual".
The present solution incorporates the anisotropic properties of the natural K0-consolidated clay, thereby providing a more realistic theoretical basis for the practical engineering problems such as the pile installation and the pressuremeter tests.
If he produces a shopping list that might be more realistic as a basis for negotiation, he will be denounced from within his party for seeking too little.
Combining such information may provide a realistic and reliable basis for predicting which ligands will bind to particular receptors as well as for modeling of how they bind.
From the results reported it becomes clear that achieving the Austrian target of a 34% share of renewable energy sources is not realistic on the basis of the scenarios calculated.
