The phrase "a critical procedure" is correct and usable in written English.
It can be used when referring to an essential or crucial process in a specific context, such as in medical, technical, or operational discussions.
Example: "Before the surgery, the team reviewed a critical procedure to ensure patient safety."
Alternatives: "an essential process" or "a vital operation."
The sensor triggers a video camera, which transmits its images halfway around the world to India, where workers are checking to see if doctors and nurses are performing a critical procedure: washing their hands.
Rather than risk being caught while performing a critical procedure, BP suspended work on its relief wells on Wednesday and began the long job of disconnecting the drilling rig.
Intubation is a critical procedure performed in emergency departments (EDs).
Transport of patients during resuscitation is a critical procedure.
Resuscitation of newborns is a critical procedure and requires refined skills.
Thus the proper handling of cycle slips has long been a critical procedure in high precision GNSS data processing.
This is a particularly critical procedure as the signal combining process aims to minimize the corresponding information errors in the presence of fading.
Against his employer's wishes, the whistleblower, Larry King, the project manager of the TMI cleanup, refused to rush a delicate and critical procedure before adequate safety tests had been conducted.
Trough preparation is a technically demanding yet critical procedure for successful expansive open door laminoplasty (EOLP), requiring both proper position and appropriate bone removal.
Voice of the customer (VOC) is a critical analysis procedure that provides precise information regarding customer input requirements for a product/service output.
Hydraulic fracturing has been the critical procedure to exploit unconventional gas reservoirs, such as shale gas reservoirs (Saldungaray and Palisch 2013).
