"enhanced technique" is a correct and usable phrase in written English.
You can use it to refer to a technique which has been made better or improved in some way. For example: "The company's new marketing strategy utilizes an enhanced technique to better target potential customers."
One 2005 memorandum, for example, asserts that "enhanced techniques" used on Abu Zubaydah and Mr. Mohammed "yielded critical information".
The document says that "unless otherwise approved by headquarters," C.I.A. officers "may use only Permissible Interrogation Techniques," which include "(a) Standard Techniques and (b) Enhanced Techniques".
It also asserts that Bikowsky misled the C.I.A. inspector general and other senior officials about the efficacy of the enhanced techniques.
The final waterboarding session was "unnecessary", and the envoy reported back, according to the clinical account of the footnote, that "enhanced techniques were no longer needed".
These "enhanced" techniques inflicted severe and lasting harm on detainees — the kind of harm explicitly criminalized by the United States War Crimes Act.
In his first months of interrogation — before the enhanced techniques — he provided more information than in the months when the C.I.A. was using the enhanced techniques.
He was put into isolation for 47 days when the interrogation team traveled, and during his next interrogation, the team used enhanced techniques, including waterboarding.
We said we've got to go use enhanced techniques… and we're going to find out.
Potential applications include more-accurate atomic clocks and enhanced techniques to make electronic chips, or integrated circuits.
Writing from personal experience in getting, useful actionable intelligence from "regular" interrogation techniques, Mr. Soufan exposes the false pretenses under which the previous Justice Department tried to justify torture, euphemistically called "enhanced techniques".
