What is Software quality ?

 Quality:- Quality is defined as the justification of all requirements of a customer in a product.

• Quality is not defined in the product. It is defined the customer's mind.
• Quality software refers to software that is reasonably bug or defect-free.
• It is delivered in time and within the specified budget.

Quality Software is reasonably 

1. Bug-free.
2. Delivered on time.
3. Within budget.
4. Meet requirement and expectations
5. Maintainable.

software product several quality methods such as the following:

1:-Portability

2:-Usability

3:-Reusability

4:Correctness

Quality System Activities: 

Auditing of projects

Review of the quality system

Development of standards, methods, and guidelines, etc.

Production of documents for the top management summarizing the effectiveness of the quality system in the organization.

Evolution of Quality Management System

The quality system has developed rapidly over the last five decades. Prior to World War II, the common task to produce quality products was to inspect finished products to remove faulty equipment. Since that time, the quality of organizations has gone through four stages of system development, as shown in fig. The first product inspection work gave a method to quality control (QC).