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).

Step 1: Understanding the question The question is asking about a specific set of principles or a management approach that prioritizes quality in all aspects of a business.

Step 2: Identifying the answer 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.

Step 3: Explaining the answer TQM involves the application of quality management standards to all aspects of the business and its interactions. It requires that the business maintains quality standards in all aspects of its operations, with the aim of long-term success through customer satisfaction. This includes the design, development, production, and service of the business's products and services.

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