The phrase "a system was implemented" is correct and usable in written English.
You can use it when describing the action of putting a system into operation or practice, often in a formal or technical context.
Example: "After thorough analysis, a system was implemented to improve the efficiency of our operations."
Alternatives: "a system was established" or "a system was introduced."
An ostensibly well-designed version of such a system was implemented some years ago in New Zealand, but recent research has shown that, while this did succeed in lowering social segregation at first, the improvement was only temporary.
Tools designed to remove images based on how much flesh was visible were throwing out too many non-nude face shots, so instead a system was implemented to ignore images that contained no recognizable faces.
Such a system was implemented in all wards in a tertiary academic hospital to explore the development process, core designs, functions, usability and feasibility.
Some of that is about design of systems and some of that is about how a system is implemented, ultimately the benefit has to be at the core of what is being put in place.
If such a system were implemented, if the law more generally required organisers to "ensure crowd safety", if we could stop calling them "stampedes", and if new research and technology could help – perhaps by putting real-time simulation software on to marshals' phones – then crowd crushes might stop happening.
A system is implemented and computational experiments are performed.
Software architecture analysis methods aim to analyze the quality of software-intensive system early at the software architecture design level and before a system is implemented.
Had such a system been implemented in Madrid, most, if not all, of the bombs would likely have been detected.
COOB insisted that such a system be implemented to ensure the sport at the Paralympic Games was serious and competitive, instead of recreational.
The role, frequency and targeting of appraisal would need further consideration should such a system be implemented, with a possible reduction in ongoing scrutiny and support for those doctors shown to be 'on track'.
However, it should be noted that the programs require no communication of patient-related information over the Internet, other than transmission of the prescription to the pharmacy, if such a system is implemented.
