The phrase "a key condition to" is correct and usable in written English.
It can be used when discussing an essential requirement or prerequisite for a particular outcome or situation.
Example: "A key condition to achieving success in this project is effective communication among team members."
Alternatives: "a crucial factor for" or "an essential requirement for".
Online monitoring of pipe conveyors operation is a key condition to their operational reliability.
This would allow fine-tuning the dosage according to the patient's metabolism, a key condition to reduce side effects.
According to that, particularly in thin films, the shared surface between Mn atoms at the grain boundaries of different phases is a key condition to obtain ferromagnetic coupling.
Therefore, the lost gas is mainly free gas during the uplifting, and a sufficient current burial depth (>2000 2500 m) is a key condition to obtain a high shale gas yield.
During three days, mobile vaccination teams including vaccinators, social mobilizers and health supervisors will walk through roads, hills, forests and remote villages to be sure that every under five years child takes the oral polio vaccine, as a key condition to stop the circulation of wild virus within the country.
The key condition to observe a capacity increase (compared to a SISO solution) is to verify the existence of a partially decorrelated MIMO channel linking transmitters and receivers.
A key condition attached to the ruling means that Germany's liabilities will be capped at €190bn.
Knowledge is also a key condition related to any creative work (Weisberg, 1999).
Last month, Greece got backing to cut 107bn euros from Greece's total government debt, which was a key condition for it to get its second bailout.
Publicity may therefore comprise a key condition for alarms to maximise their potential preventive outcome.
Nor can laïcité be seen as a system that in itself creates a key condition for Islamic terrorism to grow.
