"upgrade quality" is a correct and usable phrase in written English.
It means to improve the standard or level of something. Example: The company invested in new machinery to upgrade the quality of their products. In this example, "upgrade quality" is used to describe the action of improving the quality of the company's products by investing in new machinery.
Further developments to upgrade quality are also being studied.
They had a Japanese invasion on their own soil just like the U.S. did and had to upgrade quality just like the Big Three in order to survive.
The potential of using the biogas as energy source has long been widely recognised and current techniques are being developed to upgrade quality and to enhance energy use.
There are more examples of countries investing in increasing the numbers of multi-purpose maternal health providers, but some countries are also taking steps to strengthen and skill up their current midwifery providers, and/or creating a specialist cadre in an attempt to upgrade quality of obstetric care.
We evaluated each of the three upgrade quality factors for human evidence only.
The first - to upgrade quality assurance mechanisms for better teaching environment, teaching performance and student outcomes in primary and secondary school.
Every increase in the property tax rates on structures (not land) reduces the desirability of putting capital funds into new buildings, creates an incentive against upgrading quality by new construction, and discourages maintenance.
–Problem Recovery: helping resolve and compensate for problems, upgrading quality and ensuring complete satisfaction.
Finding appropriate methods to decrease ash content of coal tailing is essential for upgrading quality of products.
The unique features of GRADE include: (1) explicit, comprehensive criteria for downgrading and upgrading quality of evidence ratings; (2) explicit evaluation of the importance of outcomes and (3) clear separation of quality of evidence from the strength of recommendations.
The unique features of Grading of Recommendations Assessment, Development and Evaluation include: (1) explicit, comprehensive criteria for downgrading and upgrading quality of evidence ratings; (2) explicit evaluation of the importance of outcomes; and (3) clear separation of quality of evidence from the strength of care recommendations.
