Which set of principles places quality at the heart of everything a business does?

The set of principles that places quality at the heart of everything a business does is known as Total Quality Management (TQM).

Here are the steps to understand this:

1. Identify the question: The question is asking about a set of principles that prioritizes quality in all aspects of a business.

2. Understand the concept: Total Quality Management (TQM) is a management approach that originated in the 1950s and has steadily become more popular since the early 1980s. TQM means that the organization's culture is defined by and supports the constant attainment of customer satisfaction through an integrated system of tools, techniques, and training.

3. Apply the concept to the question: TQM involves the application of quality management standards to all aspects of the business, including design, development, production, and service. TQM pushes organizations to strive for innovation, continuous improvement, and the delivery of high-quality products and services.

4. Conclusion: Therefore, the set of principles that places quality at the heart of everything a business does is Total Quality Management (TQM).