The phrase "a productive idea" is correct and usable in written English.
You can use it when referring to an idea that is effective, beneficial, or leads to positive outcomes.
Example: "After brainstorming, we finally came up with a productive idea that could enhance our marketing strategy."
Alternatives: "a beneficial concept" or "an effective notion."
I drank so much in frustration while waiting that it eventually seemed like a good and productive idea to pull my rental out halfway into the middle of the road and park.
The above excerpt indicates how the students' effective collaboration fuelled productive idea generation for optimizing the goal in a redesign.
Another highly productive idea was to use cumulative features [6] that take into account the relationship between adjacent age groups, thus leading to a higher precision of age identification unlike [3].
Not one productive idea has come from this crowd in years.
Waxman built off that 50-votes-or-so theme, asking, "Don't we have anything better to do?" He too criticized Republicans for failing to present an alternative, questioning whether they have "any productive ideas" on the table.
"Just by virtue of trying to reimagine in a really radical way, it can lead to productive ideas.
"There's clearly a lot of people stepping forward with productive solutions, productive ideas, as far as how to address the problem that face us, and this seems to be someone content to stand on the sidelines and throw rocks".
Over the years, our approach to investigative problems in the intelligence field has given rise to a number of new programs, some of which have been most revolutionary, and it can be presumed that with a continued aggressive approach to these programs, new and productive ideas will be forthcoming.
His lectures were described as abounding in new and productive ideas that inspired books and theses.
