Quality Engineering
TeachersAOKI, AkioStaffInfo
Grade, SemesterYear 3 2nd semest [Department of Mechanical and Precision System, Faculty of Science and Engineering]
CategorySpecial Subjects
Elective, CreditsElective 2credit
 Syllabus Number1G305

Course Description

The following contents will be learned.
(1)Concept of system selection, parameter design, and tolerance design in quality engineering.
(2)SN ratio and Kando (sensitivity) in Quality Engineering.
(3)Design of experiments.
(4)Orthogonal array and Analysis of Variance.
(5)Case study in automobiles.
In this lesson, knowledge, techniques, and attitudes regarding DP 2, DP 3, DP 4, and DP 5 will be acquired.
Lessons are primarily lecture-style, but pair work will be carried out as appropriate according to the contents of the each lesson.

Course Objectives

Students can apply the function and robust design, and the SN ratio and Kando (sensitivity) used in quality engineering. And these factors' effect diagrams and variance analysis tables to specific cases in automobiles and the like.

Grading Policy

Your grade in the class will be decided on the evaluate with 100% of the result of the final exam. An explanation will be given after the end of the final exam.

Textbook and Reference

TextbookQuality engineering at development / design stageTAGUCHI GenichiJapanese Standards Association


(1) As preparations for next lesson, please check the meaning of the proper noun and the contents of the relationship shown in the contents of lesson, and come to the class. (90 minutes)
(2) As a review, please solve exercises applied to the items instructed during the lesson, so that you can cope with works in pair as appropriate in the next lesson. (90 minutes)


Use a calculator with functions such as logarithm, average value, and standard deviation.


1Concept of parameter design and tolerance design in Quality Engineering and dispersion.
2Basic function, purpose function, and measurement characteristic.
3Control factors, error factors, signal factors, and inner and outer factors in quality engineering.
4SN ratio and sensitivity of static characteristics.
5SN ratio and sensitivity of dynamic characteristics.
6Experiments with orthogonal (multiple placement and orthogonal array), the number of experiments, and exercises in pairs.
7Inner and outer allocation of factors and the preparation of outer factors in multiple placement and orthogonal array.
8Total variation, decomposition, and variance analysis of each variation.
9Data analysis of two dimensional arrangement, factor effect diagram, and analysis of variance(ANOVA) analysis in two dimensions. Exercises in pairs.
10Data analysis of orthogonal array L18 and exercises in pairs.
11Data analysis of orthogonal array L18 and factor effect diagram.
12Data analysis of orthogonal array L18 and variance analysis of orthogonal array L18. Exercises in pairs.
13Orthogonal polynomial, least square method, and handling of missing value.
14SN ratio, sensitivity of dynamic, and static characteristics.