The phrase "a combination of improvement" is correct and usable in written English.
It can be used when discussing various elements or factors that contribute to overall progress or enhancement in a particular area.
Example: "The project resulted in a combination of improvement in efficiency, productivity, and employee satisfaction."
Alternatives: "a blend of enhancements" or "a mix of advancements."
Economic sensitivity analysis showed that a combination of improvement in factors such as price of grouper juveniles, feeds, yield, survival, and FCR would result in higher return-on-investment (ROI).
The study concluded that the differences between groups generally reflected a combination of improvement in the standard education arm and some deterioration in the DMAS arm over time.
We did, however, observe a tendency for values to be higher at randomization than screening in both groups, which we believe is most likely due to a combination of improvement in inhaler technique and compliance with asthma treatment following education at the screening visit.
Cosgriff attributed the decline in deaths to a combination of improvements in timely medical care, police equipment and tactics that decrease occupational injury or death.
Through a combination of improvements in the optics of electron microscopes and the electron detectors used for data collection, images now taken in the microscope can provide the information to determine, at high resolution, many new and exciting biological structures.
The clearest example is in Andhra Pradesh where, through a combination of improvements in policing and generous development schemes, the insurgency has been greatly weakened in recent years.To achieve similar results, other states will in the end have to take similar measures.
The second transition indeed is made possible through a combination of improvements in computing powers, device miniaturization, ubiquitous wireless connectivity and efficient algorithms (Porter and Heppelmann, 2014).
The efficiency gains come from a combination of improvements to aerodynamics through tweaks to the front fascia that allowed a reduction of the drag coefficient; a more efficient heater; the addition of a driver-selected B-mode that increases regenerative braking; and energy/range management.
This improvement could be the result of one or a combination of improvements such as increased specific activity, reduced product inhibition, reduced nonproductive binding, or enhanced stability and longevity under process conditions.
This is likely to have occurred due to a combination of improvements in car and road design, more effective regulation of speed, better safety and accident prevention education for the young.
