The phrase "adequate and effective" is correct and usable in written English.
You can use it to describe something that meets a certain standard of sufficiency and functionality, often in contexts related to performance, quality, or results.
Example: "The training program was deemed adequate and effective in improving employee skills."
Alternatives: "sufficient and efficient" or "satisfactory and functional."
Sustaining adequate and effective medications with the least possible side effects.
to provide adequate and effective protection of intellectual property rights.
The administration argues in its new brief that it is both "adequate and effective".
This would suggest that educational preparation was adequate and effective in achieving program objectives.
"We hold that those procedures are not an adequate and effective substitute for habeas corpus," he wrote.
Compare, e.g., Friedman, Expropriation in International Law 206211 (1953); Dawson and Weston, 'Prompt, Adequate and Effective': A Universal Standard of Compensation?
the history of efforts of the United States, and the response of the foreign country, to achieve adequate and effective protection and enforcement of intellectual property rights.
In his letter, Solomont issued veiled threats, reminding its recipients that Spain is on the Special 301, the US trade representatives' list of countries that do not provide "adequate and effective" protection of intellectual property rights.
"The D.C. Circuit would have to be an adequate and effective judicial remedy for reviewing the lawfulness of any detention, because that's the basic definition of habeas corpus," Gerald L. Neuman, a professor at Harvard Law School, said.
In a brief filed on November 13th in the D.C. Circuit, the government asserted that the new law "plainly affords an adequate and effective substitute for any applicable habeas right".
The treaty would oblige signatories to take "adequate and effective measures" to protect and promote the rights of environmental defenders to life, and to free movement, expression, and assembly.
