TRIZ Paper: Japan TRIZ Symposium 2009 
Hideaki Kosha (Fujifilm Corp.), Yuji Mihara, Noritaka Nakayama, Kouichi Nakamura, Hirotake Makino
| TRIZ Paper: Japan TRIZ Symposium 2009 |
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| Study on USIT Operators Application Examples | |
| [MPUF USIT/TRIZ Study Group] Hideaki Kosha (Fujifilm Corp.), Yuji Mihara, Noritaka Nakayama, Kouichi Nakamura, Hirotake Makino |
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| The Fifth TRIZ Symposium in Japan, Held by Japan TRIZ Society on Sept. 10-12, 2009 at National Women's Education Center, Ranzan-machi, Hiki-gun, Saitama, Japan | |
| Introduction by Toru Nakagawa (Osaka Gakuin Univ.), Dec. 20, 2009; Japanese translation: Jul. 23, 2010. | |
| [Posted on Jul.25, 2010] |
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Editor's Note (Toru Nakagawa, Jul. 23, 2010)
This paper was presented last year at the 5th TRIZ Symposium in Japan, 2009
in a Poster session. The USIT/TRIZ Study Group of MPUF
The presentation slides (15 slides)
are posted in Japanese, but only 4 slides of them
are translated into English. However, in Nakagawa's "Personal Reports of Japan TRIZ Symposium 2009"
This paper aims at analyzing a number of new technologies familiar to us with the eyes of USIT and accumulating them in a collection of case studies. The analysis puts much emphasis on the close observation of mechanism/process of the problem system in terms of time and space and on the understanding of the mechanism and root causes. The Authors classify the problems into 4 classes, i.e., A: Excess of function, B. Insufficiency of function, C: Instability of function, and D: Harmful effects, and further into 16 sub-classes in accordance with the generalized categories of root causes. In the analysis of case studies, the Authors try to assign the essence of inventors ideas in terms of the USIT Operators (i.e. a set of 32 sub-operators derived from all the idea generation methods in TRIZ). In this manner, the Authors are developing an Index Matrix where appropriate frequently-used USIT Operators can be obtained for each type of problems. In comparison to the Altshuller's Contradiction Matrix, the USIT Index Matrix is much more generalized (i.e. only 16 problem types in place of 39x39) and straightforward.
[1] Abstract
Study on USIT Operators Application Examples
[MPUF USIT/TRIZ Study Group]
Hideaki Kosha (Fujifilm Corp.), Yuji Mihara, Noritaka Nakayama, Kouichi Nakamura, Hirotake Makino ()Abstract
The aim of our study team is to offer a guide for USIT users to utilize USIT Operators. USIT Operators were developed as clues to generate ideas from viewpoints of Object-Attribute-Function. We tried to derive the index from relationships between technical problems and solutions by case studies of familiar examples, in which we imagined to use USIT Operators to solve the assumed problem. We will present what we obtained from those case studies we made.
[2] Presentation Slides in PDF
Poster Introduction Slides in English in PDF
Poster Slides in Japanese in PDF
[3] Introduction to the Presentation (by Nakagawa)
Excerpt from:
Personal Report of The Fifth TRIZ Symposium in Japan, 2009, Part G. Patent Studies and Tools
by Toru Nakagawa (Osaka Gakuin University), Dec. 20, 2009
Posted on Dec. 24, 2009 in "TRIZ Home Page in Japan"Hideaki Kosha (Fujifilm Corp.), Yuji Mihara, Noritaka Nakayama, Kouichi Nakamura, Hirotake Makino ([MPUF USIT/TRIZ Study Group]) [J26 P-B5] gave a Poster presentation with the title of "Study on USIT Operators Application Examples". The Authors belong to another voluntary study group coming from many different companies. (Concerning to MPUF USIT/TRIZ Study Group, see Part D. Maeda et al.) The Authors' Abstract is quoted here first:
The aim of our study team is to offer a guide for USIT users to utilize USIT Operators. USIT Operators were developed as clues to generate ideas from viewpoints of Object-Attribute-Function. We tried to derive the index from relationships between technical problems and solutions by case studies of familiar examples, in which we imagined to use USIT Operators to solve the assumed problem. We will present what we obtained from those case studies we made.
The structure of this work is shown in the slide (right). The principal intention is to make the USIT Operators easier to understand and apply. H. Kosha and Y. Mihara are coauthors with T. Nakagawa in the original paper of deriving the USIT Operator System (2002)
The basic understanding has come from Hideaki Kosha's work
The Authors also think it important to understand the detailed process in any phenomena or action.
Now let us see the documentation style by the Authors. The slide (right) is a fixed-format document of a case example. This is a needle threader having a back plate for easier positioning of the needle against the threader loop. Examples may be taken from familiar/new products, patents, techniques, etc. The items to be described in this format are mostly quite natural, including (1) problems, (2) root causes, (4) description & sketch, and (5) interested/impressed points. Whereas the description of '(3) generalized root causes' is a result of further abstraction (or categorization), which will be explained later. The description of '(6) presumed applied USIT Operators' is the result of analyst's interpretation of the inventor's way of thinking to develop the new product/process.
USIT emphasizes to observe the mechanism and to draw sketches of the problematic scene, especially for the root cause analysis. The 3 sketches in the left column of the slide (right) tell the difficulties: The needle hole is small and the thread is fuzzy. Even when the tip of the thread enters the hole, the fuzz of thread is out of the hole and is blocked. If one pushes the thread, it vends easily and does not pass through the needle hole. The effective size of thread with fuzz is often much larger than its original size and than the hole size. This is one of the root causes. This kind of root cause analysis is carried out on the basis of concrete observation and physical/chemical/etc background.
In the present work, the Authors try to generalize or categorize the root causes (see slide right), with the intention of categorize various (technical) problems from the USIT/TRIZ point of view. The Authors classify technical problems in the four main categories: A. Excess of functional achievement, B. Insufficiency of functional achievement, C. Unstable functional achievement, and D. Appearance of Undesired/Harmful effects. One of the sub-categories of B is: B3 Low transmission (efficiency) of energy/force/thing. And its further subcategories include: B3(2) due to spatial mismatching (in place or in direction). Knowing these categories, the Authors assigned the root causes in the present case as: difficulty of placing the thread into the hole --> B3(2) due to spatial mismatching in place; difficulty caused by the fuzz --> B3(2) due to spatial mismatching in place; and difficulty in the bending of the thread --> B3(2) due to spatial mismatching in direction.
The Authors also observe the function of the needle threader, or its essential part (i.e., threader loop), carefully along its process of work. The whole process of using the needle threader is shown schematically in the slide (right). The threader loop plays different roles/functions in time. It passes through the needle hole by changing its apparent width by virtue of its soft elastic character, allows the thread pass through its large diamond-shaped hole, passes back through the needle hole, drags the thread through the needle hole, and finally leaves the thread at the position of passing through the needle hole. By observing these functions closely, we can understand various key properties necessary for performing them. All these observations are reflected in the description of the '(6) presumed applied USIT Operators', in the format of the case example.
[*** Note that the Authors pay much attention to the basic idea of the needle threader. The role of the back plate of the (new) product has another auxiliary function. ]
The Authors categorize the technical problems in a hierarchical way as follows:
A. Excess of functional achievement A1. Excessive in the function of the original energy/force/thing A2. Concentration (distribution) of the energy/force/thing is excessive A3. Increase (concentration) by other energy/force/thing to the excessive level spatial concentration temporal concentration B. Insufficiency of functional achievement B1. Insufficient in the function of the original energy/force/thing B2. Dispersion/resistance of the energy/force/thing (distribution) spatial dispersion temporal dispersion B3. Low transmission efficiency of the energy/force/thing spatial mismatching (in place and in direction) temporal mismatching B4. Consumption of energy/force/thing to other function (including heat, vibration) C. Unstable functional achievement C1. Periodic disturbance spatial periodicity (e.g. shape) temporal periodicity C2. Non-periodic disturbance spatial disturbance (e.g. shape) temporal disturbance C3. Overlap of non-constant functions D. Appearance of Undesired/Harmful effects.
Using these categories of problems and the hierarchical system of USIT Operators, the Authors are planning to accumulate the analyses of cases, just as described above, and eventually construct an Index Matrix as shown in the slide (right). The columns of this Matrix are the 16 categories of technical problems (see above), while the rows are USIT Operators. In this slide, 24 (among 32) USIT sub-operators are arranged in the order of Attribute dimensional change, Function distribution, and Object pluralization methods.
The slide (right) explains the process of using the Index Matrix, together with some examples in the case of developing a filter for blood plasma [this case is not explained in this review].
*** As reviewed here, the Authors' work of collecting the case-study analyses based on USIT is much different in its core concepts from the ones based on TRIZ (and Technical contradiction) in spite of their apparent similarity. The general concept of functions and problems is sound, and the approach of close observation of mechanism of problem/function is powerful to reveal the essence. I wish the Authors' group extend their work further and to get useful results for easier usage of USIT Operators.
| Top of this page | Abstract | Poster Introduction Slides in PDF |
Nakagawa's Introduction | Poster Slides in Japanese, PDF |
Nakagawa's Personal Report of Japan TRIZ Symp. 2009 |
Japan TRIZ Symp. 2009 |
Japanese page |
Last updated on Jul. 25, 2010. Access point: Editor: nakagawa@ogu.ac.jp
