The phrase "are still being designed" is correct and usable in written English.
It can be used when referring to ongoing processes or projects that are currently in the design phase.
Example: "The new features for the software are still being designed, so we expect to release them next quarter."
Alternatives: "are still under development" or "are still in the design phase."
Boeing has said it will use inerting technology in its 7E7, which is still being designed.
This is especially relevant in Asia, where a new security architecture is still being designed.
And this for a school whose building remains a construction site, where the curriculum is still being designed and only 8 of 180 teachers have been hired.
After initially accepting it as something produced by the program, an official later said the report was instead created by a contractor as a sample during a period when the social networking component of its media monitoring program was still being designed.
WHEN artists at the National Theater here began creating their World War I drama "War Horse" five years ago, they placed cardboard boxes over the heads of actors to imagine stand-ins for the show's horse puppets, which were still being designed.
Just like the bloated military budgets and weapons systems that are still being produced that were designed to counter the Soviet Union, so too are the ideas and "strategies" concocted from these think tanks and policy institutes.
Xenon has historically been too expensive to be used very much in practice, but it has been successfully used for surgical operations, and xenon anesthesia systems are still being proposed and designed.
Today, in spite of new technological advances, techniques and materials, identical buildings are still being built, and climatic design is not considered important in Diyarbakır.
Although tissue engineering has been attracted greatly for healing of critical-sized bone defects, great efforts for improvement are still being made in scaffold design.
