This brief guide discusses what Quality Function Deployment (QFD) is, its importance and benefits, its four phases, and some FAQs. Learn more about how an innovative mobile app software can help organizations optimize the QFD process.
Published 22 Jul 2022
Quality Function Deployment (QFD) is a proactive, focused approach used in taking the Voice of the Customer (VOC) into account and then carrying out effective responses to customer expectations and needs during the design and production stages. Initially considered a form of cause-and-effect analysis, QFD is an essential tool not just for quality management but also for planning.
Originally developed in Japan by Professors Yoji Akao and Shigeru Mizuno in the late 1960s while working for Mitsubishi’s shipyard, QFD was later adopted and widely used by other companies such as Toyota and its suppliers. Consequently, the methodology was introduced in the US during the late 1980s primarily by automotive companies and electronics manufacturers. It’s also commonly known as a basic Total Quality Management (TQM) tool, being used by organizations in the manufacturing and healthcare industries, among others.
The goal was to create a methodology that integrates customer satisfaction into a product before implementing its manufacturing process. This presents a more proactive approach than other methods of quality control that focus on fixing customer issues during or after manufacturing.
Usually, customer requirements are communicated in the form of qualitative terms such as “safe,” “user friendly,” “ergonomic,” and so on. For organizations to effectively develop a product or service, these qualitative terms from customers need to be translated into quantitative design requirements. This is where QFD comes in. By combining various matrices to form a comprehensive house-like structure called the “House of Quality”, manufacturers and production facilities can come up with a prioritized list of customer needs and a systematic process of integrating them into the design of the product or service.
Hence, organizations can then make better decisions after weighing customer requirements and considering how the products or services go against the competition in the market. How QFD helps in this aspect is that it provides the needed documentation for the overall decision-making process.
Now, how does this approach help organizations ensure the quality of their processes particularly in product development? To summarize, here are a few of the major advantages of using QFD:
Also known as the product planning matrix, the House of Quality (HoQ) is practically the most essential stage of the QFD. This is where every bit of detail must be taken into consideration, as it’s going to set the pace for the succeeding stages of the four-phase QFD. Further, HoQ serves as a primary graphical representation of the product planning and development process.
House of Quality Example | QFD Matrix
In general, there are 6 main rooms or areas inside the House of Quality. Apart from answering the question “How do I fill out a QFD?,” these rooms also give an overview of how to effectively use the House of Quality template:
The 4 Phases of QFD
QFD enables cross-functional teams to collaborate and find a balance between customer needs and technical requirements. This is crucial in streamlining the way manufacturers and production facilities decide what kind of features or characteristics they should include in their products and services that customers will buy and value.
The comprehensive process of QFD is divided into 4 major phases: Product Planning, Product Development, Process Planning, and Production Planning. Each matrix or visual representation used under each of the 4 phases is related to the previous one. Let’s look into what happens under each stage.
In this stage, the House of Quality matrix is used to translate customer needs into design requirements. The Voice of the Customer (VOC) is gathered through conducting Focus Group Discussions (FGDs), interviews, and other similar methods. Then, feedback and insights from such customer requirements are lined up for design and product features considerations.
As this phase will help set the pacing of the entire QFD process, it’s important to cover various aspects as well. These include identifying the underlying—apart from the obvious, stated ones—customer requirements, characteristics of possible market offerings, and competitive opportunities. It’s also crucial to note that this stage is typically led by the Marketing department.
This phase enables the team to specify design requirements by identifying critical parts and assembly components. These are then based on the prioritized list of offering characteristics gathered in the Product Planning phase using the House of Quality matrix.
The third phase involves deciding on the design manufacturing and assembly process that best addresses the requirements discussed in the Product Development phase. Teams responsible for this aspect must be able to define the required operational guidelines, elements, and parameters.
The final phase is where process control methods are established, along with the production and inspection processes. These are key to ensuring that the characteristics are met and continuously undergo evaluation and improvement.
As mentioned in the Importance section of this brief guide, QFD is a more proactive approach in such a way that it aims to incorporate customer feedback during the initial stages of production and manufacturing processes. Also, most quality initiatives focus on minimizing or eliminating errors—human or machine-made—to produce maximum results and achieve zero defects. Unlike other quality management tools, QFD takes the extra step to ensure that design processes capture customer requirements—underlying or stated—toward positive experiences and valuable offerings.
The overall methodology of Six Sigma lies on the principle of gathering and integrating the VOC throughout an organization’s quality process. QFD is an effective tool to do so, as the first and most essential stage involved in it requires obtaining customer requirements using the House of Quality or product planning matrix.
As the principle and practice of Total Quality Management (TQM) must be present in every aspect of the organization, QFD provides ways to seamlessly integrate its best practices into every stage of the product development process. One of the main principles of TQM is Customer Focus, in which the comprehensive methodology of QFD is most applicable with its core emphasizing customer requirements in the production process.
Using technology in implementing quality processes and in improving process controls puts organizations at a great advantage. Having streamlined systems in place gives way for creating products and services that meet market demands and surpass customer expectations.
All these boils down to establishing a Quality Management System (QMS) and using a tool that can meet its demands. QMS software solutions such as iAuditor by SafetyCulture lets you monitor every stage of the manufacturing and production processes to check if it meets the customer and design requirements.
Empower your teams in ensuring proper QFD implementation by maximizing the following features of iAuditor:
Patricia Guevara is a content writer and researcher for SafetyCulture. With her extensive content writing and copywriting experience, she creates high-quality content across a variety of relevant topics. She aims to promote workplace safety, operational excellence, and continuous improvement in her articles. She is passionate about communicating how technology can be used to streamline work processes, empowering companies to realize their business goals.
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