Approaching Product Subjective Sustainability: Comparative Analysis of the Lifecycle of Short-and Long-lived Products from the Viewpoint of ‘Kansei’ Engineering

By Seyed Javad Zafarmand, Fumio Terauchi and Hiroyuki Aoki.

Published by The International Journal of Design Management and Professional Practice

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Article: Electronic $US5.00

The present work proposes the concept of Product Subjective Sustainability to indicate ‘the emotional, affective and/or aesthetical capability of a product to satisfyingly and pleasantly last during its expected long/short lifetime’. To clarify this concept analytically and to expand it experimentally, we have conducted an analytical study on the evolution of users’ Kansei toward their short/long-lived products throughout the entire lifecycles of their products. Kansei, in its professional definition, embraces a wider range of subjective issues of product than any other term like emotion. In this research, the product lifecycle from the user’s perspective is divided into three different stages: purchasing/choosing, keeping/using and replacing/throwing away the product. Mobile phone, private passenger car and handicraft are assigned as the short-lived and long-lived product cases for the investigation. Three groups of Iranian subjects, as the users or owner of these three kinds of products, are investigated and the changes of their Kansei toward their products are analyzed. The outcome of this analysis will be the Kansei factors, which have association with the investigated subjects’ rationale when purchasing, keeping/using and replacing/parting their short/long-lived products. Eventually, the patterns of Kansei evolution of these three groups over the lifecycle stages of their short/long-lived products are extracted and the resulting Kansei structures concerning the lifecycle stages are compared between the assigned products.

Keywords: Kansei Evolution, Attachment, Mobile Phone, Passenger Car, Handicraft

The International Journal of Design Management and Professional Practice, Volume 6, Issue 1, pp.1-32. Article: Print (Spiral Bound). Article: Electronic (PDF File; 1.127MB).

Dr. Seyed Javad Zafarmand

Postdoctoral Researcher, Design Science Division, Graduate School of Engineering, Shiraz University, Iran, Iran (Islamic Republic of)

Dr. Zafamand received his BA and MA in Industrial Design from University of Tehran, Iran, and PhD in Design Science from Chiba University, Japan. Currently, he is the Assistant Professor of School of Art and Architecture at Shiraz University, Iran. He worked as the Associate Researcher (teaching staff) of Asian Global Design Schools Program at Graduate School of Engineering, Chiba University, from October 2007 to March 2009. From June 2006 to September 2007, he was the Assistant Professor of Industrial Design Dept at University of Tehran, Iran. From September 1998 to April 2001, he was the lecturer (faculty member) of School of Art and Architecture at Shiraz University, Iran.

Prod. Fumio Terauchi

Associate Professor, Design Science Division, Graduate School of Engineering, Chiba University, Chiba, Japan

Dr. Terauchi received his Doctor of Engineering from Chiba University, Japan. Currently, he is the Associate Professor of Materials Planning, Design Science Div, Graduate School of Engineering, Chiba University.

Prof. Hiroyuki Aoki

Professor, Design Science Division, Graduate School of Engineering, Chiba University, Chiba, Japan

Professor Aoki received his Doctor of Engineering from University of Tokyo, Japan. Currently, he is the Professor of Materials Planning, Design Science Div, Graduate School of Engineering, Chiba University, Japan. He is also the President of Japanese Society for Science of Design (JSSD). The present postdoctoral research on Product Subjective Sustainability is done under his leadership and supervision.