"decrease in quality" is a correct and usable phrase in written English.
You could use it to refer to something declining in quality. For example, "There has been a noticeable decrease in quality in this product over the last year."
In truth, this had less to do with any decrease in quality than the fact that Dr Who was now being scheduled against Coronation Street.
One United States official, quoted by the New York Times, said of the communications: "The switches weren't turned off, but there has been a real decrease in quality".
Other warning signs, according to the site, are an increase in complaints, a decrease in quality of work, growing aggressiveness and dawdling in the lunchroom and restrooms.
Individuals experience a decrease in quality of life as a result of insufficient treatment.
Often, persons who undergo physical therapy have experienced a decrease in quality of life as a result of physical impairments or functional limitations caused by disease or injury.
Many patients experience a decrease in quality of life following sepsis, particularly if the patient is older or the attack severe.
If enacted, cuts will lead to restricted care, clinic closures, and ultimately a decrease in quality of life.
Despite increased family involvement, the TW group reported no increase in DFC or decrease in quality of life.
Injuries to tendons and ligaments are prevalent and result in a significant decrease in quality of patient life.
"The switches weren't turned off, but there has been a real decrease in quality" of communications, said one United States official, who like others quoted spoke on the condition of anonymity to discuss intelligence programs.
Average citations to publications, however, appear to decline for repeat patenters, suggesting either a decrease in quality or restrictions on use associated in patent protection.
