"development idea" is correct and usable in written English.
You could use it when talking about an idea that could lead to progress or improvement, for example, "This development idea could lead to increased efficiency in our operations."
The city is conducting a $17,000 marketing and feasibility study on the specifications of the hotel and the larger downtown development idea.
Calls the Governor's tax breaks to companies "corporate welfare". Major economic development idea is to have the state give preference to New York companies in awarding contracts.
Moreover, the reported construction of visual ratiometric detection system follows the sustainable development idea, that is, from nature, for nature, and into the nature.
The Städel, atypical for European institutions, relied on state funding for less than fifteen per cent of its budget, and Hollein is not above an out-there development idea: in 2014, he proposed working with a drug-store chain to sell hundred-euro prints of works from the museum's collection.
Kathryn McDowell, the LSO's managing director, called it a "cradle-to-grave" audience development idea, put together with a company called Baby IQ. "If you introduce people to music [when they are] toddlers, then perhaps later they come to family concerts or get involved in an LSO education project.
Moreover, the reported construction of visual ratiometric detection system follows the sustainable development idea of ''from nature, for nature, into the nature'' and promotes the use of naturally renewable resources to produce promising and eco-friendly functional materials for various applications.
