"based on discretion" is correct and usuable in written English.
It is used when you are considering or deciding on something, especially in an official or legal context, after weighing up all the factors involved. For example: "The judge ruled based on discretion, noting the mitigating circumstances."
During labor, some women were given one dose of intravenous antibiotics based on clinician discretion.
Some pregnant women received one dose of intravenous antibiotics during labor based on clinician discretion.
Furthermore, the 18th and 19th century architecture along these streets is gradually losing their original features because of undocumented and unguided renovations, as well as retrofitting works that are based on the discretion and taste of building owners.
Human Rights Watch (HRW) found that of the first 100 prisoners executed in 2015, 56 had been based on judicial discretion and not for crimes for which Islamic law mandates a specific death penalty punishment.
Furthermore, in the majority of the enrolled studies, clinical patient care is individualized based on the discretion of the clinician.
After the initial screening investigations of an electrocardiogram and capillary blood sugar, the subsequent management was based on the discretion of the attending emergency physician or inpatient specialists.
The management and the utilisation of specific investigations like computer tomographic (CT) scans were based on the discretion of the attending doctors.
Wide variations in workers' circumstances and schedules based on individual discretion and desire are distinctive features of the new sharing economy a direct result of the autonomy and independence the workers enjoy.
To incentivize them, Larian has committed to giving donors of over $10 million a Toys R Us store dedicated in their name in any location they choose, along with toys from the retailer for life (based on his discretion, though).
