The phrase "additional time required" is correct and usable in written English.
It can be used when indicating that more time is needed to complete a task or process.
Example: "Due to unforeseen circumstances, additional time required to finalize the project will be necessary."
Alternatives: "extra time needed" or "more time necessary".
In wave III of the ABC study, it was not practical to employ human voice recorders for the collection of dental data because of the extra space requirements, or computer-based voice-recording software because of the additional time required to record data and the unreliability of data capture.
You will not be fined for the additional time required to return books in person.
But when she factored in the additional time required to help her colleague, her pro-rated hourly pay dropped dramatically.
It is the uncertainty about the terms of that relationship, far more than the additional time required to clarify the negotiating position, that carries the more significant cost.
The lower overall degradation efficacy of deGradFP might be a consequence of the additional time required for expression and folding of the deGradFP protein.
The additional time required by our system is negligible when compared to the power saved from uploading fewer data to a cloud storage.
Furthermore, the additional run time required by utilizing our strategy is minimum and can be ignored.
It directs the reader to the best tool for finding information needed without having to waste additional search time required by older methods.
We decided to support only Scan Code Set 2 in order to avoid the additional development time required to implement the other less commonly-used sets.
Take Two, the game's publisher, which had the final say in the matter vis-à-vis Rockstar, delayed the game for "additional development time required to complete the title".
This is likely due to the additional lag time required for the microinjected material to diffuse to the Ca2+ release sites in the oocyte cortex.
