ASSIGNMENT

JABATAN KEJURUTERAAN MEKANIKAL
JF608- QUALITY CONTROL
EOC 1
(Answer all questions)

CLO 1
1
List THREE (3) benefits of quality implementation to the company or organization.
                                                                                                                  (3 marks)

CLO 1
2
Explain 2 the differences between quality control and quality assurance.
                                                                                                                  (4 marks)

CLO 1
3
Define the continuous improvement                                                (3 marks)
CLO 1
4
The average height of 24 students in Section 1 of a course in quality control is 1.75m, the average height of 18 students in Section 2 of quality control is 1.79m, and the average height of 29 students in section 3 of quality control is 1.68m. What is the average height of the students in the three sections of quality control?
                                                                                                                 (5 marks)
                                                                                                            
CLO 1
5
Table A below shows the frequency distribution of the packaging process
produced by the machine "form-fill-seal".

Subgroup
Frequency
Subgroup
Frequency
60 – 66
5
81 – 87
10
67 – 73
8
88 – 94
3
74 – 80
13
95 - 101
1

i.      Determine cell boundaries.
 (3 Marks)
ii.     Calculate the mean and standard deviation         
                                        
(10 Marks)
iii.    Construct histogram
 (7 Marks)

CLO 1
6
In the precision grinding of a complicated part, it is more economical to rework the part than to scrap it. Therefore, it is decided to establish the rework percentage at 12.5%. Assuming normal distribution of the data, a standard deviation 0f 0.01mm, and an upper specification limit of 25.38 mm (0.99 in), determine the process center.
                                                                                                                    (5 marks)

CLO 1
7
Using Table A (Areas under the normal curve), determine the value (Z) below,
a)     Greater than Z = 1.0                                                          (2 marks)
b)     Less than Z = 2.0                                                              (2 marks)
c)     Less than Z = -2.0                                                             (2 marks)
d)     Between Z = -1.5 and Z = 0                                               (4 marks)



Prepared by:                                                                                         Verified by:


Noor Hapizah Binti Abdullah                                                            En. Mohamad Nazri B. Ismail
Quality Control Lecturer                                                                     Head of  Manufacturing Programme
Mechanical Engineering Department                                             Mechanical Engineering Department

Politeknik Merlimau,  Melaka                                                            Politeknik Merlimau,  Melaka

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