The phrase "a complex procedure that" is correct and usable in written English.
It can be used when describing a process or method that involves multiple steps or intricate details.
Example: "The project requires a complex procedure that must be followed to ensure successful completion."
Alternatives: "a complicated process that" or "an intricate method that".
That requires a change in the constitution, a complex procedure that starts in the life of one parliament but can be completed only in the next.
It is, however, a complex procedure that is very invasive and at risk of infection.
Facial transplantation is a complex procedure that corrects severe facial defects due to traumas, burns, and congenital disorders.
However, the second stage is a complex procedure that may negate the advantages of the first stage.
Neonatal resuscitation is a complex procedure that requires the use of specialized knowledge and skills in an emotionally charged and stressful situation.
Robot-assisted radical cystectomy (RARC) with totally intracorporeal neobladder diversion is a complex procedure that has been reported with good outcomes in small series.
There are two commonly used methods for assessing the level of consciousness of a patient: a simple procedure that requires minimal training, and a more complex procedure that requires substantial expertise.
Because of its heterogeneity and complexity, the complete degradation of xylan is a more complex procedure that requires the synergistic action of several xylanolytic enzymes.
The fact that none of the parameters had a very good consistency was expected because the perceptive assessment is a very complex procedure that includes various subjective elements that are not totally understood [ 36, 39].
Positioning is a more complex procedure that involves the acquisition from signals transmitted and received from different parts of the network, and therefore it is also dependent on the problem geometry.
Nevertheless, no matter what decision support systems nurses may rely on, telephone triage appears to be a very complex procedure that requires specific skills [ 30- 32].
