The phrase "a thoughtful decision" is correct and usable in written English.
You can use it when referring to a choice made after careful consideration and reflection.
Example: "After weighing all the options, I believe that choosing to invest in renewable energy was a thoughtful decision."
Alternatives: "a careful choice" or "a deliberate decision."
"I hope they will understand that Andrea made a thoughtful decision".
She described him as a thoughtful decision maker, "with the ability to look at problems with a fresh outlook".
"Secretary Richardson is to be commended for making a thoughtful decision," Mr. Thompson said at the time.
I gave the sales manager my feedback: it was a great presentation; a thorough analysis of the data; and a thoughtful decision to propose a pilot program.
"I suspect that that timing, coupled with her desire to take her overdue sabbatical, afforded her the opportunity to make a thoughtful decision about the future".
The first President Bush recognized that a thoughtful decision would be needed on how to dispose of tons of weapons-grade plutonium if his Start initiatives were successful.
It's been a long process, and they have made a responsible, thoughtful decision".
It seemed like a hell of a surprise that the jury managed to come up with a complete and thoughtful decision after only 21.5 hours of deliberation, and that surprise has arguably just been justified.
We had made a very careful, thoughtful decision to have Kim.
Savvy negotiators heed the lessons above while keeping the negotiations moving forward, and gathering all the information needed to make an informed and thoughtful decision.
We can not draw any unambiguous conclusions about which is the best methodology to use but we may provide support to researchers in making an informed and thoughtful decision about how to proceed, depending on the context.
