"cool decision" is correct and usable in written English.
You can use it when you want to express approval for someone's choice or decision. For example: "That was a cool decision, Jack. I'm proud of you for standing up for your beliefs."
Veteran outside-half Ronan O'Gara continues to be an icily cool decision maker under big match pressure".
"I just think it's very cool decision of Allan [The Fall's creator, writer and now director Allan Cubitt] to set it in Belfast because there's no necessity to," he says.
The most ambitious thing about it is its lack of ambition, its cool decision not to include any dramatic events beyond a twisted ankle on a Welsh hillside, a brush with hypothermia and a controversial kiss between teenage girls.
That was a cool decision!
He lacks the lethal pace that distinguishes the very best midfield playmakers but compensates with his cool decision-making and precise execution at decisive moments.
WHEN fighting two wars, trying to stop Iran building nuclear weapons and facing a continuing danger of terrorist attacks, few things matter more than cool decision-making in the White House.
One piece of good news for Bush is that Rove is not starry-eyed about his man, as is widely believed -- he has enough distance to make cool decisions.
Which, of course, makes the cucumber-cool decision-makers at King's College Hospital the people you want looking after you.
The Sony film by the Oscar-winning pair who made "The Hurt Locker" will no doubt reflect the president's cool, gutsy decision against shaky odds.
His complaint was inspired by an article in The New York Times which claimed Bigelow and Boal "are getting top-level access to the most classified mission in history", and said their film would "reflect the president's cool, gutsy decision against shaky odds".
This is ideal for something like sports, but makes cool rational decision making harder.
