The phrase "are used systematically" is correct and usable in written English.
It can be used to describe a methodical or organized approach to using something consistently over time.
Example: "In our research, various techniques are used systematically to ensure accurate results."
Alternatives: "are applied consistently" or "are utilized in a structured manner."
Nevertheless, technical disadvantages related to the former methods encouraged us to standardize a method that could be used systematically for a large number of targets.
They were used systematically as weapons to defeat scores of liability cases against tobacco companies.
Information obtained by my organisation shows that the painful "distractions" have been used systematically in the four privately run child prisons, and many children have been injured.
And it would create a state committee to determine how DNA evidence can be used, systematically, to prevent and reverse false convictions.
However inclusivity is not in the government's lexicon and it is aware of the brooding discontent – significantly the guards have yet to be used systematically in the clampdown, the government preferring to use the Basij militia.
Hijacking planes is certainly not new: since the late 1960's, when the tactic first began to be used systematically by the Palestine Liberation Organization and its sympathizers, there have been some 500 hijackings.
As early as 2013, the UN independent commission of inquiry investigating alleged war crimes in Syria said attacks on medical facilities were being used systematically as a weapon of war by the Assad regime.
Rape was used systematically to terrorize and drive wedges between women and their communities in a culture where rape victims often become social outcasts, said Kim Vradenburg, program manager for the International Rescue Committee in Kenema.
Chlorine has been used "systematically" in the ongoing civil war in neighbouring Syria, the organisation for the prohibition of chemical weapons, found last year.
Local hemostatic measures and antifibrinolytic treatment were used systematically.
