"source of improvement" is correct and usable in written English.
You can use it when referring to something that can be used to make improvements or progress. For example, "The government invested in new technology as a source of improvement for their infrastructure."
A likelier source of improvement would be more severe punishment for cheating in the scrum.
They argue that their electronic systems have been the main source of improvement in Nasdaq's quotes in recent years, and that this will end with Super Montage.
In analyzing every play of the season according to down and distance, game situation and opponent strength, Football Outsiders identified the Jets' running game as a primary source of improvement over those four games, going from poor to above average.
The emerging world accounted for most of the rise; its reserve holdings soared from less than $1 trillion to $4.7 trillion.Research by economists Philip Lane and Jay Shambaugh concludes that reserve growth is the single biggest source of improvement in emerging-market exposure to foreign currencies.
CNNs were recently shown to outperform DNNs under channel-mismatched conditions [39], which may be the source of improvement at r=1.
Better management of human competencies is becoming a new source of improvement of industrial performances for many companies, be they goods production, service or administrative organizations.
Study month appears to play an important role in all outcomes, which suggests that general improvements in clinic and system efficiency were a source of improvements in outcomes over the study period.
Some companies are using lean and green as simultaneous sources of improvement in various sectors of industry – from automotive and retail to textile and brewing.
After the end of the competition we revisited the challenge tasks to investigate potential sources of improvement.
In a recent book, "Creating a Lean and Green Business System: Techniques for Increasing Profits and Sustainability", my co-authors and I discussed companies which are using lean and green as simultaneous sources of improvement in various sectors of industry--from automotive and retail to textile and brewing.
Finally, because the turbine-generator set is the first oil-free prototype developed by the manufacturer, potential sources of improvements are discovered and discussed.
