The phrase "effective case" is correct and can be used in written English.
It is typically used to refer to a legal case or argument that is persuasive and successful in achieving its intended outcome. Example: The lawyer's presentation of evidence and witness testimonies made for a highly effective case, ultimately leading to the defendant's acquittal.
You can't make an effective case for VA not effectively using social media when their dedicated public servants are reaching out to Vets in trouble just because a piece of criticism comes across their Twitter stream or Facebook wall.
"Senator Gillibrand made an effective case".
This approach and the need for strong and effective case management has proved a success.
The absence of clear guidelines, Mr. Garza's lawyers believe, severely hampers their ability to make an effective case for clemency.
It said: "As Labour members we believe the Government has not made an effective case for military intervention in Syria".
"They make an effective case that we can safely explore for oil and gas this summer in the Arctic".
A good knowledge of the legal implications of tenancy fraud, investigation and interviewing skills, and effective case management are all beneficial.
At the heart of all good fundraising is an effective case for support – a powerful and engaging argument as to why a donor should support your work.
On first glance, it's a simple and effective case of art imitating the very real life disappearance of these places across the country.
Illustrating James Traub's essay (The Way We Live Now, Feb. 29), which offers an effective case against legacy in college admissions, was a 1959 photo of a father and son outside Michigan State University's Spartan Stadium, waving Michigan State pennants.
The court's answer to these questions was, apparently, that the claimants would not be able to do any of these things, making the government's case "neither permissible … nor practical, in terms of effective case management or costs management".
