> For the complete documentation index, see [llms.txt](https://d2m.doyoki.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://d2m.doyoki.com/week-07.md).

# Week 07

Tolerance, Kerf, Quality Assurance, Design for Manufacturing, Assembly, Service, Tool Life, Wear

## Tolerance

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPVvko_ORwS6mFz7gGC%2F683px-Mechanical_Tolerance_Definitions.svg.png?alt=media\&token=a6e791b2-1c78-48e4-b12a-3e926eb9b3d2)

## Fit

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPVvnTPiSD-ON1ZGBId%2FHole_and_shaft_fit_chart.jpg?alt=media\&token=e66ba978-0288-4bc6-bfea-4b4a11410d51)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPVvqJ3QGo4lcu0kQSj%2FHoleAndShaftBasis.png?alt=media\&token=900bd107-6b66-4bec-a560-d537ebb52e4d)

{% embed url="<https://youtu.be/EsJkjEIh-mw>" %}

#### Least Material Condition&#x20;

#### Maximum Material Condition

{% embed url="<https://youtu.be/AP_T7hf5Wv0>" %}

## Kerf

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPVzpx5OpjcFv8JVBjQ%2Fkerf-width-illustration.gif?alt=media\&token=7089b430-1b90-41e2-9e05-599955f7a74f)

{% embed url="<https://youtu.be/BB4mhfffcgY>" %}

## Quality Assurance

{% embed url="<https://youtu.be/tsF-8u-V4j4>" %}

## Kaizen 개선 &#x20;

{% embed url="<https://youtu.be/wot9DFzFRLU>" %}

## Steve jobs on Quality, Deming and Juran

{% embed url="<https://youtu.be/XbkMcvnNq3g>" %}

#### Juran : Train everyone from top to bottom on planning, improvement, quality

#### Deming : Statistical approach&#x20;

## Accuracy 정확도 VS Precision 정밀

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPW8n63OenoW7mKXf4Q%2Fprecision_accuracy.png?alt=media\&token=b5e4498a-7815-4db2-980b-8100189016d5)

#### Accuracy : 정확도 : 원하는 값을 가지는지?

#### Precision: 정밀도 : 원하는 값이 반복되는지?&#x20;

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWCo0_1spggLSvdREf%2F-LPWFt923ZH5DiYCqWd1%2Flean-vs-six-sigma-jk-28-638.jpg?alt=media\&token=ec557816-62f5-453c-8862-bab8e83b58e2)

## 6-Sigma  (4-Sigma: Industry Average) &#x20;

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPW9yxqscAeBBylVsBr%2FSix-sigma-and-COPQ.png?alt=media\&token=d1bd8311-8538-4299-b061-67cd7642d2d7)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPWA0klz3V6LqK_nSJz%2Fsix-sigma-levels-defects.png?alt=media\&token=94436d8d-ee59-43d6-a9d9-3bcb4dbb11d7)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPVv_xr8LVO-vjysa5Y%2F-LPWAxCnlxlwM6Abd0tP%2F6SigmaGraph.jpg?alt=media\&token=ab597699-9ada-4367-9afe-c3f34c2d21df)

## Design for Manufacturing, Assembly, Service

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWJbhuXhVONv3j2hnc%2F-LPWJjq2bqluGy8VHMmQ%2FKakaoTalk_Photo_2018-10-23-23-26-55.jpeg?alt=media\&token=893b6764-3ada-4167-b522-8a849ecc6a71)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWW3hiV-q0ZfDg0KtC%2F-LPWWRdJHNtEchbaXHS7%2Fdesign-for-x-design-for-manufacturingdesign-for-assembly-17-638.jpg?alt=media\&token=5df70fa6-2d1d-4d83-bedf-2b8eb7509172)

## Tool Life, Wear&#x20;

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWW3hiV-q0ZfDg0KtC%2F-LPWWLH2_1hfhBD49dIM%2Fcrater-wear-flank-wear.jpg?alt=media\&token=ae78ade3-3d8b-44e8-a7aa-63f8b5052a9b)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWW3hiV-q0ZfDg0KtC%2F-LPWWVIfPNvCnE4cidot%2Ftypes%20of%20tool%20wear.png?alt=media\&token=0b3da211-dbd9-4ecd-9a83-7cd654ac5b9d)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWW3hiV-q0ZfDg0KtC%2F-LPWX2tiXbrRtyHlmwhm%2Fnpa-2018-08-p03-01.png?alt=media\&token=85483f9f-e0e9-4746-82f1-7d29274b3526)

![](https://2172911760-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LGiM_CATu5rKs3maiWG%2F-LPWW3hiV-q0ZfDg0KtC%2F-LPWX5yHngfVEX6Z9xIm%2FProducts_02_f.jpg?alt=media\&token=d0b9d5d8-a26a-45e8-8dd9-2165a978ad2a)

{% embed url="<https://www.topgear.com.ph/news/technology-news/honda-volkswagen-v2x-communication-intersections-a2578-20181007>" %}

{% embed url="<https://www.bloomberg.com/news/articles/2018-10-21/fiat-is-said-to-agree-to-magneti-marelli-sale-to-kkr-s-calsonic>" %}

{% embed url="<https://www.volvocars.com/us/shopping-tools/purchase/care-by-volvo>" %}

{% embed url="<https://www.rivian.com/vehicles>" %}

{% embed url="<https://edition.cnn.com/2018/10/18/cars/bugatti-volkswagen-factory/index.html?utm_medium=social&utm_source=fbbusiness&utm_content=2018-10-18T21:56:31>" %}

### 책: 부의 감각&#x20;

사람들은 5만원짜리 운동화를 살 때, 1만원을 아끼기 위해 차로 20분 거리에 있는 할인점으로 달려간다. 하지만 100만원짜리 가구를 살 땐 1만원을 아끼자고 10분 거리에 있는 다른 가게로 가지 않는다. 어차피 할인되는 가격은 똑같이 1만 원인데 말이다. 왜일까?\
\
출처 : <http://news.chosun.com/site/data/html\\_dir/2018/07/09/2018070902574.html>

### 디자이너의 디자인과 생산가격 고민할 때 소비자가 차를 사는 심리를 고민하라....

{% embed url="<https://youtu.be/Zq10ctYVnxM?t=256>" %}

Ferrari Engine Assembly: Tolerance