The phrase "an unmanageable task" is correct and usable in written English.
You can use it to describe a task that is too difficult or overwhelming to handle effectively.
Example: "The project quickly became an unmanageable task, leading the team to seek additional resources for support."
Alternatives: "an insurmountable challenge" or "a daunting task".
Reading and extracting pertinent information from those articles has become an unmanageable task for scientists.
But by turning the role into an unmanageable task we risk alienating those with the passion and skill to succeed.
On the practicalities, Hughes commented: "It looks to me as if it may be an unmanageable task.
A number of participants engaged with faculty in multiple email discussions about particular cases and guidance documents; while this email case exchange was highly desirable from a pedagogical perspective, it would have quickly become an unmanageable task for faculty had more participants availed themselves of the opportunity to exchange ideas in this manner.
Several lawmakers described the message from law enforcement experts as telling them to simply use common sense but that protecting all 535 members of Congress from largely unpredictable threats was a somewhat unmanageable task.
Several lawmakers described the message from law enforcement experts as telling them to use common sense, and that protecting all 535 members of Congress from largely unpredictable threats was a somewhat unmanageable task.
By having each private company assume responsibility for its corner of the Internet, the government effectively outsources the otherwise unmanageable task of monitoring the billions of e-mail messages, news stories and chat postings that circulate every day in China.
Goddard declined to appear before MPs to explain her sudden resignation and instead sent a 10-page critique in which she claimed the inquiry was facing an unmanageable and impossible task.
"When an organisation is overburdened by an unmanageable number of tasks, things go wrong.
The introduction to Adam Phillips's new book is titled Freud's Impossible Life, and the author makes clear more than once his view that the biographer's task is an unmanageable one.
As can be seen in Table 2, Participant-12, who works in the private sector, stated that several task-related bullying acts, such as exposing victims to an unmanageable workload or withholding benefits, were frequently used by employers or managers in private sector companies to pressure unwanted employees into leaving their job.
