Quality and Grader are two terms from Project Quality Management, that could pose a challenge of understanding to many Project Managers. https://www.mudassiriqbal.net/quality-vs-grade/ For Other PM Concepts, you may visit https://www.mudassiriqbal.net/project-management-terms-and-concepts

1. Quality and Grade
Quality
Quality is basically what the customers and stakeholders require from the project deliverables. By
keeping the definition associated with the consumer or stakeholder, quality management can have a
narrow focus which means its more probable to achieve the ultimate project goals. Managing the
project quality involves many factors such as setting quality targets and defining how to calculate
those quality targets and reporting on them. Project quality incorporates the procedures and practices
that are used to determine and achieve the quality of the deliverables of a project. Though, quality
can be an elusive term.
Quality is conformance to the requirement and fitness for use. Requirements include
product’s and customer’s requirements.
ISO 9000 defines quality as “the degree to which a set of inherent characteristics fulfils
the requirements.”
Grade
“A category assigned to deliverables having the same functional use but different
technical characteristics.” PMBOK 6
The term “grade” refers to a level, category, features or ranking system which is used to distinguish
between various items that serve the same important function but own varying attributes which result
in different standards of quality output.
Usually, high-grade items are capable of more sophisticated or advanced tasks whereas low-grade
items are more suitable for low-end or less labour-intensive chores.
The grade is a classification allocated to products that have the same functional use but diverse
technical features. The grade is typically determined through a set of pre-defined measurements and
demonstration of acquiescence to those dimensions. For instance, if you intend to buy laptops for the
project management office, there are primarily two options to choose from. One is the low-grade
option that comes with limited features whereas the other is a high-grade option with advanced
capabilities and features. so you may say products with different configuration are kept in different
grades.
Quality is conformance to the requirements.
Grade is a categorization of the product based on its characteristics i.e same functional
use but different technical characteristics
Important Note

2. A product can be a high grade (high-end) or a low grade (low-end), it is perfectly acceptable, and
there is no problem with it as long as it fulfils its stated requirements
Low quality is a problem whereas low quality is a choice based on circumstances and requirements
The project manager and the project management team are responsible for determining and
delivering the required levels of both quality and grade
Quality cannot be determined through the sole comparison of two products. Quality as per our
definition is based upon how well it meets the needs of the person using it.
Quality deals with the client requirements i.e client satisfaction and Grade is all about
your purchasing power
Examples
1. Business Class vs Economy Class: Different
Grades, none should be low quality
2. Free Service vs Paid Service: Both should be
quality oriented and best in their own class
3. High quality vs Low-Quality Diamond
4. Grade of Diamond