The phrase "a voluntary effort" is correct and usable in written English.
It can be used to describe an action or contribution that is made willingly and without coercion.
Example: "The community came together to support the local shelter through a voluntary effort to raise funds and awareness."
Alternatives: "an optional contribution" or "a willing endeavor".
The I.M.F.'s announcement referred to a voluntary effort but no details will be available for some time.
A voluntary effort by the electronics industry to verify the sources of the minerals it uses is still in its infancy.
The institute, a nonprofit financed by the insurance industry, attributed the findings to a voluntary effort between itself and automakers that began in 2003.
There are many verses in the Qurʾān that encourage these nightly recitations and other verses that indicate such practices should remain "a voluntary effort" (17:79).
You're experiencing flow when your mind and body are stretched to their limits in a voluntary effort to accomplish something you believe to be difficult and worthwhile.
The threat of such losses, however, could encourage investors, including some American banks, to join a voluntary effort aimed at reducing Argentina's debt.
While strength is defined as the integrated result of several force-producing muscles performing maximally, either isometrically or dynamically during a single voluntary effort of a defined task, power is the product of force and the inverse of time, i.e., the ability to produce as much force as possible in the shortest possible time [9].
The modern game of tennis has evolved to a current fast-paced, explosive sport based on strength and power. 1 66 67 Maximal strength is defined as the result of force-producing muscles performing maximally, either in isometric or dynamic patterns during a single voluntary effort of a defined task.
There's something pleasingly homespun about this; it's a completely voluntary effort that has been more than a year in the planning and has involved a whole army of people.
Public health minister Anne Milton said the government believed the best way to achieve results was through a "collective voluntary effort".
Meanwhile, the DOD adds that it is engaged in a broad voluntary effort to gauge the potential for munitions constituents to migrate from any of its facilities, and that it intends to share the results of this effort with regulators and the public.
