Methods of managing quality

Methods of Managing Quality

This topic is assessed in IBDP Business Management at Higher Level (HL) only.

Beyond the broad distinction between quality control and quality assurance examined in the previous section, several specific methods and frameworks are used by businesses to achieve and maintain quality standards. These range from employee-led improvement groups and external benchmarking to comprehensive management philosophies and direct customer experience assessment. Understanding each method, its mechanism, and its limitations is essential for HL analysis of quality management.

Quality circles

A quality circle is a small group of workers from the same work area who meet regularly — typically once a week or fortnight — to identify, analyse, and solve quality-related problems in their area. The group is voluntary, employee-led, and focused on practical improvements within the workers' own domain rather than management-initiated projects. Quality circles draw on the same principle as kaizen (examined in the methods of lean production section): front-line workers understand the problems in their area better than anyone and should be empowered to address them.

Quality circles generate improvements in quality and efficiency, improve worker engagement and morale (giving employees a voice and agency over their work), and develop problem-solving skills. Their limitations include the risk of becoming unfocused without clear objectives and adequate facilitation; and the tendency to tackle symptoms rather than root causes if analytical skills are not developed. They also require sustained management support — a quality circle that generates improvement proposals that management consistently ignores will quickly become demotivated and disband.

Benchmarking

Benchmarking is the process of comparing a business's performance, processes, or products against an external standard — typically the best-performing competitor, a recognised industry leader, or a non-competing business acknowledged as best-in-class in a specific process area. By identifying the gap between current performance and the benchmark, the business establishes a quantified improvement target and learns from the practices of the benchmark organisation.

Three forms of benchmarking are common: competitive benchmarking (comparing against direct competitors — limited by the difficulty of accessing competitors' internal data); industry benchmarking (comparing against industry-wide averages or standards, which are more accessible but less aspirational); and best-practice benchmarking (comparing against the acknowledged leader in a specific process, regardless of industry — a logistics business might benchmark its invoicing process against an e-commerce company renowned for billing accuracy). The key limitation of benchmarking is that it identifies the gap without necessarily explaining how the benchmark organisation achieves its standard — the "what" is visible but the "how" may require further investigation or direct collaboration.

Total Quality Management (TQM)

Total Quality Management (TQM) is a comprehensive management philosophy — rather than a specific technique — in which quality is the responsibility of every person in every function of the organisation, and continuous improvement of all processes, products, and services is an overriding organisational objective. TQM integrates quality into every business decision, every employee's role, and every supplier relationship rather than treating it as the concern of a specific quality department.

Key principles of TQM include: customer focus (defining quality in terms of customer requirements, not internal standards); total employee involvement (every employee at every level is responsible for quality); process approach (quality is achieved through designing and improving processes, not through end-of-process inspection); continuous improvement (no process is ever assumed to be optimal — the pursuit of improvement never ends); and supplier quality (quality cannot be achieved in the business's own processes if suppliers deliver defective inputs).

TQM is closely related to the lean production philosophy — both are built on continuous improvement, employee involvement, and waste elimination. The impact of TQM on organisational performance is examined in the following section on the impact of lean production and TQM.

Mystery shopping and quality sampling

Mystery shopping involves trained researchers posing as ordinary customers to evaluate the quality of service delivery — assessing staff knowledge, attitude, compliance with service standards, and overall customer experience. It provides an objective, real-world assessment of service quality from the customer's perspective, capturing elements that management observation and customer surveys may miss. Mystery shopping is particularly valuable in service businesses where quality variation between staff and locations is significant, as it creates accountability without requiring direct management presence.

Quality sampling (statistical sampling) involves selecting and testing a representative subset of production output — rather than inspecting every unit — and using statistical methods to infer the quality of the full batch with a defined level of confidence. It is cost-effective (inspecting 5% of output costs far less than inspecting 100%) and scientifically rigorous when properly designed. Its limitation is the inherent risk of sampling error — a bad batch can occasionally pass if the sample happens to contain no defective units.