The basics of quality function deployment (QFD), how to use it to meet customer needs, and its key points

Understanding Quality Function Deployment (QFD)

💡 こうした調達・受発注の属人化、newji なら「ひとつの画面」で解決。見積依頼から発注・進捗・承認までAIが下支えします。

14日間無料で試す →

Quality Function Deployment, commonly known as QFD, is a systematic process used to ensure that customer needs are understood and met throughout the product development process.
It is a method that translates customer requirements into appropriate company requirements at every stage, from research and product development to engineering and manufacturing.

QFD helps organizations focus on characteristics that are important to the consumers, ensuring high levels of customer satisfaction.
By using QFD, companies can better prioritize features, better allocate resources, and make sure the end product aligns closely with customer expectations.

The Origins of QFD

QFD was first developed in Japan in the late 1960s by Dr. Yoji Akao, who wanted a quality assurance system that was more preventive in focus than the traditional methods.
The concept was introduced to the United States in the 1980s and has since grown to be a fundamental part of many organizations’ quality improvement programs.
The approach has been adopted worldwide across different industries, ranging from automotive to healthcare and beyond.

How QFD Works

QFD is often visualized through a set of matrices.
The most common tool used in QFD is the House of Quality, which is a detailed matrix that displays the relationship between customer desires and the company’s capability to meet those desires.

The House of Quality

The House of Quality is the cornerstone of the QFD process.
It begins by capturing customer requirements, often referred to as “Whats.”
These are the needs and wants of the customer.

Next, the company must list out the “Hows,” which are the ways the organization can respond to these requirements.
Each “How” is evaluated in terms of how well it meets the “Whats,” and this is done through the interrelationship matrix, a key component of the House of Quality.

The matrix allows teams to visualize at a glance how customer requirements match up with organizational measures.
This visualization helps in identifying any areas of conflict or inconsistencies in the design process and spotlights areas for potential improvement.

Steps in Quality Function Deployment

QFD typically involves a series of steps, each dependent on the successful completion of the previous one.
Here is a simplified overview of these steps:

1. Identify Customer Needs

The first and foremost step in QFD is to gather and understand customer needs.
This can be done through various methods such as surveys, focus groups, and direct customer interviews.
The goal is to compile a comprehensive list of what customers value and expect from the product or service.

2. Prioritize These Needs

Once the needs have been captured, the next step is to prioritize them based on importance to the customers.
This typically involves customers ranking their needs or using a Likert scale.

3. Translate Needs into Specifications

The prioritized customer needs are then translated into product specifications.
The team identifies how each need can be met and what design features can be incorporated.

4. Develop the “House of Quality”

Link customer needs with product specifications using the House of Quality matrix.
Teams assess the relationship between customer needs and how these can be operationalized within the organization’s capabilities.

5. Adjust the Design and Test

Finally, with the guidance of the QFD results, teams proceed with designing the product or service.
This might involve making adjustments based on feasible improvements and testing to validate that the final output meets customer expectations.

The Benefits of QFD

The implementation of QFD provides numerous benefits, crucially aligning the design process with customer expectations.

Enhanced Customer Satisfaction

By prioritizing the voice of the customer, QFD ensures that the developed product or service meets or even exceeds customer expectations.
This leads to increased customer satisfaction and loyalty over time.

Reduced Development Time and Costs

QFD helps identify potential issues before they become costly problems.
By addressing customer needs early, organizations can avoid the time and expense that comes with redesigning products later in the process.

Better Communication and Teamwork

QFD promotes cross-functional team collaboration, as it involves input from various departments including marketing, engineering, and manufacturing.
This collaboration ensures a well-rounded understanding of customer needs and organizational capabilities.

Key Points to Consider

While QFD is a powerful tool, successful implementation requires careful attention to certain key points.

Commitment from the Top

Having commitment from top-level management is crucial for the success of QFD.
They must allocate proper resources and encourage cross-functional teamwork.

Accurate Data Collection

The effectiveness of QFD largely depends on the accuracy and reliability of the data collected from customers.
Using a robust method for data collection is important to ensure true customer voice is captured.

Training and Education

Teams involved in QFD must be properly trained and educated about the methodology.
Understanding how to correctly use the tools and interpret results is key to executing QFD proficiently.

QFD is a systematic approach focusing on designing products that closely align with customer needs.
By prioritizing what customers value, companies can enhance satisfaction and loyalty, reduce development costs, and foster better communication among teams.
The key to successful QFD lies in capturing accurate customer data, strong leadership support, and effective cross-functional collaboration.
When these elements are in place, QFD becomes an invaluable tool in a company’s quality improvement arsenal.

WHITE PAPER

この記事の理解を深める
無料ホワイトペーパーをプレゼント

製造業の現場で使える実務資料（PDF）を無料でお届けします。"こんな資料が届きます" ↓ 下のボタンからどうぞ。