Abstract
This paper proposes “Value Axiom” that states “The larger the sum of Customer Attribute values, the better the design.” A customer evaluates a design with the sum of the value produced by each Customer Attribute, expressing it with a monetary value such as Japanese yen. A designer can hardly estimate and express a perfect set of Customer Attributes at the early stage of a design. The designer writes down the design equation to visualize the entire design, and improves the sets of Design Parameters and Functional Requirements using the Independence Axiom and Information Axiom, and at the same time, it is also important to review the values of Customer Attributes using the Value Axiom.
Highlights
Axiomatic Design (AD) [1] is extremely effective in the design process of visualizing the definition of the design contents to understand the entire picture, and further in the process of decoupling interferences among Functional Requirements (FRs) when confronted with a problem with an existing design
The instructors, together with the students, should lay down the Design Equation (DE), select Design Parameters (DPs) to satisfy the Independence Axiom and Information Axiom, check that the Customer Attributes (CAs) has increased with the Value Axiom, and if it is still insufficient, discuss what CA is missing from the design or coupled with the other CAs
We introduced above, developed rice cups of pilaf or dry curry that would cook by just pouring hot water into the cup, it hardly made any sales and was withdrawn from the market
Summary
Axiomatic Design (AD) [1] is extremely effective in the design process of visualizing the definition of the design contents to understand the entire picture, and further in the process of decoupling interferences among Functional Requirements (FRs) when confronted with a problem with an existing design. The customer may come up with disturbances: for example, another CA way to use the product that the designer never thought of, or an unexpected natural disaster can cause a recession to cancel a CA value, or worker’s strike at an overseas production site making a delay to lose customer’s appetite for buying In case of such drastic happenings, the only effective countermeasure for the designer is to flexibly and quickly modify the design equation with a new set of CAs, FRs, Cs, and Design Parameters (DPs). Through iteration of conceptual design, prototyping, testing, evaluation, design improvement, another prototyping, retesting, reevaluation the sum gradually increases its value and when all problems have been conquered, it is close to the ideal sum of CAs values During this time, if the design leader can show the entire design process with the Design Equation (DE) to visualize the progress, the direction for the design to make advances are clarified and members of the design team can carry a unified vision. The instructors, together with the students, should lay down the DE, select DP to satisfy the Independence Axiom and Information Axiom, check that the CA has increased with the Value Axiom, and if it is still insufficient, discuss what CA is missing from the design or coupled with the other CAs
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