The term "capability decline" is correct and usable in written English.
You can use it when referring to a decrease or reduction in the ability of someone or something to do something. For example, "The team's capability decline was evident in its recent tournament performance."
Likewise, Romanian military capability declined because of a lack of fuel as well as training.
It is the period that most people currently reach by their 80s, when their capabilities decline and they return increasingly to a childlike state of dependency.
However, when the Islamic State's financial capabilities decline they'll no longer be able to do that.
After the Soviet Union's demise, the American intelligence capabilities declined.
Kadijević conversely said that the JNA would have fared better if Croatian forces had confronted it earlier because the JNA's capabilities declined during the summer of 1991.
Clearly, if the defense budget continues to be reduced every year, there will come a point at which the country's defense capability will decline through attrition as items of equipment become obsolete or beyond repair.
So does Britain's reduced military capability, a decline more obvious to America, which has several times had to bail its ally out in both Iraq and Afghanistan, than it is to most Britons.
"Without strong leadership, careful planning and additional funds, these capabilities will decline".
"It's likely our capabilities will decline fairly precipitously at just the time they're most needed," he said.
"It's likely our capabilities will decline fairly precipitously at just the time they're most needed," said Dennis Hartmann, a professor of atmospheric sciences at the University of Washington and the chairman of the committee that produced the report.
