Quality can be defined in many different ways. We will look as some of the most comonly used definitions:

Quality is the totality of features and characteristics of a product or service that bears on its ability to satisfy given needs.
American National Standards Institute (ANSI)

Quality is conformance to requirements.
Philip Crosby

Quality is fitness for use
Dr. Joseph M. Juran, Quality pioneer and major contributor to quality management

Fitness for use = Providing the right features + free from deficiencies

At Studio Sottile we like to of quality using this last definition. A product or service has good quality if it provides the right features free from deficiencies.

In addition the right features can command a higher price and still attract customers.

The value stream of products or services with higher features should still be free of deficiencies.

For value stream is the combination of processes, resources and information use to develop, make and deliver the products or services.

It is also essential to keep quality across time and locations by eliminating variations in the value stream.

Variations is a change in data, characteristic or function caused by one of four factors: special causes, common causes, tampering or structural variation.
American Society for Quality (ASQ)