Quality_Homework2

# Quality_Homework2 - Ashley Worley Quality Homework Chapter...

This preview shows pages 1–2. Sign up to view the full content.

Quality Homework Chapter 2 Homework 2. A. Upper Tolerance = 36 Lower Tolerance = 24 Mean = 30 Standard Deviation = 4 Actual Upper = 30+4*4 = 46 Actual Lower = 30-4*4 = 14 No, this company is not delivering six sigma quality because the upper and lower limits are closer to the mean than the actual values. B. Distance from UTL to mean = 36 – 30 = 6 4*x = 6 x = 1.5 Distance from LTL to mean = 30 – 24 = 6 4*x = 6 x = 1.5 The standard deviation must be reduced from 4 to 1.5 hours to achieve six sigma quality. 4. Upper Tolerance = 90 sec Lower Tolerance = 30 sec Mean = 60 sec Standard deviation = 6.52 sec Actual Upper = 60+6.52*6.52 = 102.51 Actual Lower = 60 – 6.52*6.52 = 17.49 90 – 60 = 30 6.52*x = 30 x = 4.6 60 – 30 = 30 6.52*x = 30 x = 4.6 This company is not operating at six sigma quality. The must reduce the standard deviation from 6.52 sec to 4.6 sec if they wish to achieve six sigma quality. 9.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/02/2011 for the course QM 670 taught by Professor Dr.keeney during the Fall '11 term at Jefferson College.

### Page1 / 4

Quality_Homework2 - Ashley Worley Quality Homework Chapter...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online