"requires manual" is correct and usable in written English.
This phrase could be used in a sentence such as, "This task requires manual input from a human operator."
The rules have to be manually defined so adding additional diseases requires manual intervention.
Otherwise most of the data that the app can collect requires manual entry — how long you've been asleep, for example — or new hardware, like measuring heart rate.
The Department of Agriculture USDAA), which oversees the scheme, requires manual, paper-based verification of applicants, based solely on the information they provide.
Each schema evolution also requires manual (re)mappings.
The most significant complication is bleeding that requires manual compression.
They believe that startups like Foursquare, which requires manual updating, represent out-of-date technology.
However, ensemble generation is mostly a time-consuming process which often requires manual interaction.
(5) When testing requires manual participation, automated testing is not conduced.
The threshold is conventionally set artificially, which lacks adaptability and requires manual intervention.
Assuming a higher threshold requires manual pre-screening of the results.
Such a method requires manual adjustment of several thresholds and configurable parameters.
