The phrase "advanced phase of" is correct and usable in written English.
It can be used to describe a later or more developed stage in a process, project, or situation.
Example: "The project has now entered the advanced phase of development, where we will focus on testing and refinement."
Alternatives: "mature stage of" or "developed phase of".
Even now, in an advanced phase of California's treatment program for the most persistent sex offenders, Mr. Price says he questions his ability to keep his urges in check.
This is mostly a silent tumor whose diagnosis is casually found in imaging tests since the clinical manifestations generally indicate advanced phase of the disease.
The Hamma (Algeria) desalination plant, briefly described in the paper, was mathematically modelled in order to check its behaviour in an advanced phase of its design.
In the advanced phase of discharge the rupture band pattern undergoes repetitive fluctuations due to the formation of new shear bands and the diminishing of existing ones.
Although highly effective in chronic phase CML, patients who have progressed to the advanced phase of the disease frequently fail to respond to imatinib or develop resistance to therapy and relapse.
The advanced phase of the breathing crack in the heavy duty horizontal rotor system is expected to be dominated by the open crack state rather than the breathing state after a short period of operation.
Today, the characterization of wall temperatures is performed experimentally by complex thermocolor tests in advanced phases of the design process.
And so when Simon Kuznets began looking at inequality trends in the 1950s, the data suggested to him that in "advanced phases" of capitalist development inequality tended to fall.
More than a hundred protein-based drugs are now in advanced phases of clinical trials, and many more are in development in the laboratory.
Most current Alzheimer's disease (AD) therapies in advanced phases of development target amyloid β-peptide (Aβ) production, aggregation, or accumulation.
According to Kuznets's theory, income inequality would automatically decrease in advanced phases of capitalist development, regardless of economic policy choices or other differences between countries, until eventually it stabilized at an acceptable level.
