The phrase "full-fledged system" is correct and can be used in written English.
You can use it when referring to a system that is fully developed, organized, and capable of functioning in its intended capacity. For example, "The company recently implemented a full-fledged system that tracks customer orders and orders inventory."
For now Germany will not hear of a European banking union, let alone a full-fledged system of fiscal transfers.
Over the three decades, English language education in China has matured into a full-fledged system (see Dai 2008; Wang and Xu 2014; Wen and Xu 2011, 2012, 2013).
Before turning to our first full-fledged system of deontic logic, let us note one very important principle that is not contained in all deontic logics, and about which a great deal of controversy in deontic logic and in ethical theory has transpired.
These have all been very massive objects, at least as big as Jupiter, but the discoveries have fueled hopes that full-fledged systems with planets more like Earth, possible abodes of life, may eventually be found.
The Treatise was Hume's attempt to formulate a full-fledged philosophical system.
Google said Tuesday night that it still had work to do to develop a full-fledged operating system.
The new service, Facebook Messages, is a bold move by Facebook to expand from a social network into a full-fledged communications system.
He also rejected the proposal for a National Salvation Front government to replace the coalition government, saying that a new government would have less popular support and only delay the transition to a full-fledged democratic system.
Unlike PayPal, a full-fledged payment system that can be used to transfer money between individuals and can draw funds directly from bank accounts, Checkout merely offers users an easy way to use their credit cards.
CrunchGear Right now Linux is a full-fledged operating system.
Even so, it's still not the full-fledged operating system many of us require on our desktop machines.
