Quality Function DeploymentQuality Function DeploymentQFD

Vivian Cherie

KJ

Introduction Quality function deployment was first

developed in Japan in the Kobe Shipyards in 1970.

Today more than 10,000 companies in America and West Europe are utilizing the techniques of QFD. Automotive industry the furthest in

implementation of QFD

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What is QFD?

What is QFD?

QFD is an analytical process which provides an approach to deploying the voice of the customer through all aspects of the product development process.

What is QFD?

It is a planning tool used to fulfill customer expectations.

A disciplined approach to product design, engineering, and production and provides in-depth evaluation of a product.

What is QFD?

Using QFD for new product development always involves a cross-functional team with the skills necessary for designing the product, writing engineering specifications, purchasing materials, and planning the tooling and production work.

What is QFD?

The efforts of these teams eliminate rework and typically reduce development time by as much as 50%.

QFD helps identify new quality technology and job functions to carry out operations.

What is QFD?

This tool provides a historic reference to enhance future technology and prevent design errors.

QFD is basically a set of graphically oriented planning matrices that are used as the basis for decisions affecting any phase of the product development cycle.

What is QFD?

QFD results are measured based on the number design and engineering changes, time to market, cost and quality.

QFD enables the design phase to concentrate on customer requirements, spending less time on redesign and modifications.

The QFD Team

Two Types of Teams

A. New product.

B. Improving an existing product.

Teams consist of members from marketing, design, quality, finance and production.

Team Meetings A. The project manager and team members

need to commit a significant amount of time, especially in the early stages.

B. Priorities and the scope of the project need to be clearly defined and told to all departments within the organization so time can be budgeted appropriately.

C. Duration of meetings vary depending on where team’s members are coming from and what needs to be accomplished.

Benefits of QFD

Customer Driven

Reduces Implementation Time

Promotes Teamwork

Provides Documentation

See Fig. 11-1 pg 286

The Voice of the Customer

The Voice of the CustomerThe Voice of the Customer

QFD begins with marketing to find out what exactly the customer

wants from a product.

Sources for Determining Sources for Determining Customer ExpectationsCustomer Expectations

1. Focus Groups2. Surveys3. Complaints4. Consultants5. Standards6. Federal Regulations

The QFD Team Must The QFD Team Must Continually Ask:Continually Ask:

1. What does the customer really want?

2. What are the customer’s expectations?

3. Are the customer’s expectations used to drive the design process?

4. What can the design team do to achieve customer satisfaction?

Collecting the DataCollecting the Data

Solicited Unsolicited Quantitative Qualitative Structured Random

Fig. 11-2 Pg. 288

Organizing the DataOrganizing the Data

Organizing the DataOrganizing the Data

The Affinity Diagram gathers a large amount of data and organizes the data into groups based on natural interrelationships.

The Affinity Diagram is ideally suited for most QFD applications;other data organizers include:

Interrelationship Diagrams, Tree Diagrams, Cause and Effect Diagrams (See Chapter 19)

Organizing the DataOrganizing the Data Reasons to implement :2. Thoughts are too widely dispersed or

numerous to organize.

3. New solutions are needed to circumvent the more traditional ways of problem solving.

4. 3. Support for a solution is essential for successful implementation.

Constructing the Affinity Constructing the Affinity DiagramDiagram

Phrase the objective Record all responses Group the responses Organize groups in an affinity diagram

Affinity diagramsAffinity diagrams

House of QualityHouse of Quality

House of QualityHouse of Quality The primary planning tool used in QFD

is the house of quality. ( See pg. 291)

Building a House of Quality

Hierarchy treesHierarchy treesA Hierarchy tree or Tree Diagram also illustrates the structure of interrelationships between groups of statements, but is built from the top down in an analytical manner. It is usually applied to an existing set of structured information such as that produced by building an Affinity Diagram and is used to account for flaws or incompleteness in the source data. Working down from the top a team can amendments at each level and the completed hierarchy can be drawn as shown below.

Hierarchy treesHierarchy trees

Matrices and tablesMatrices and tablesThe matrix is a tool which lies at the heart of many QFD methods. By comparing two lists of items using a rectangular grid of cells, it can be used to document a team's perceptions of the interrelationships that exist, in a manner which can be later interpreted by considering the entries in particular cells, rows or columns. In a prioritization matrix the relative importance of items in a list and the strength of interrelationships are given numerical weightings (shown as numbers or symbols). The overall priority of the items of one list according to their relationships with another list, can then be calculated as shown below.

Matrices and tablesMatrices and tables

Exterior WallExterior Wall = Customer requirements

Left side = Voice of customer

Right side = prioritized customer requirements

Ceiling or second floorCeiling or second floor = technical descriptors

engineering characteristics, design constraints and parameters

Interior walls = relationship between customer requirements and technical descriptors

Roof = interrelationship between technical descriptors

Foundation = prioritized technical descriptors

benchmarking, technical difficulty degrees and target values

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