INSTRUCTION: This section consists of FOUR [4] structured questions. Answer ALL questions.

INSTRUCTION: This section consists of FOUR [4] structured questions. Answer ALL questions. ARAHAN: Bahagian ini mengandungi EMPAT [4] soalan struktur. Jawab SEMUA soalan. QUESTION 1 SOALAN 1 CLO1 C2 a) Explain the meaning of ; Jelaskan makna ; i) Mean Purata ii) Range Julat [4 marks] [4 markah] CLO1 C3 b) The score of students in a statical test scattered in normal distribution with mean 68 and standard deviation of 12. Determine the probability that a random selected student will get marks ; Markah murid-murid dalam satu ujian stastik tertabur secara normal dengan min 68 dan sisihan piawai 12. Tentukan kebarangkalian bahawa seseorang murid yang dipilih secara rawak akan mendapat markah ; i) More than 75 Lebih daripada 75 ii) Less than 60 Kurang daripada 60 iii) Between 65 & 70 Di antara 65 & 70 [7 marks] [7 markah] 2 SULIT

CLO1 C3 c) Control charts for X and R are used to establish the dimension of a product that normally measured in millimeters. The data were collected in 15 subgroups as shown in Table 1(c). Carta kawalan X and R digunakan untuk menetapkan dimensi produk yang biasanya diukur dalam unit mm. Data dikumpul dalam 15 subkumpulan seperti dalam Jadual 1(c). Table 1(c) / Jadual 1(c) Sample X1 X2 X3 X4 X5 Avg Range 1 10.68 10.689 10.776 10.798 10.714 10.689 0.116 2 10.79 10.86 10.601 10.746 10.779 10.86 0.259 3 10.78 10.667 10.838 10.785 10.723 10.667 0.171 4 10.59 10.727 10.812 10.775 10.73 10.727 0.221 5 10.69 10.708 10.79 10.758 10.671 10.708 0.119 6 10.75 10.714 10.738 10.719 10.606 10.689 0.143 7 10.79 10.713 10.689 10.877 10.603 10.86 0.274 8 10.74 10.779 10.11 10.737 10.75 10.667 0.669 9 10.77 10.773 10.641 10.644 10.725 10.727 0.132 10 10.72 10.671 10.708 10.85 10.712 10.708 0.179 11 10.79 10.821 10.764 10.658 10.708 10.689 0.163 12 10.62 10.802 10.818 10.872 10.727 10.86 0.250 13 10.66 10.822 10.893 10.544 10.76 10.667 0.349 14 10.81 10.749 10.859 10.801 10.701 10.727 0.158 15 10.66 10.681 10.644 10.747 10.728 10.708 0.103 Average 10.728 0.22040 Calculate control limit and from chart for this data. Data was collected in subgroups sample size of 5. Kirakan had kawalan dan dari data tersebut. Data dikumpul dalam subkumpulan dengan saiz sampel sebanyak 5. [7 marks] [7 markah] 3 SULIT

CLO1 C4 d) Voltage tests data for component used in a microcomputer for resistant company are presented in Table 1(d). The sample size is 4. Calculate the control limit for the testing and the central line for and as well. Data ujian voltan ke atas sebuah komponen yang digunakan dalam mikrokomputer untuk Syarikat Resistant telah direkodkan seperti dalam Jadual 1(d). Saiz sampel ialah 4. Kirakan had kawalan untuk ujian tersebut dan nilai garis tengah untuk and. Table 1(d) / Jadual 1(d) Sub-Group R Sub-Group R 1 482 32 14 476 22 2 506 24 15 485 23 3 463 32 16 499 23 4 469 26 17 460 25 5 474 24 18 469 24 6 484 24 19 474 23 7 476 28 20 484 25 8 513 23 21 476 29 9 502 24 22 485 25 10 463 26 23 490 22 11 469 25 24 461 27 12 474 24 25 469 22 13 484 24 [7 marks] [7 markah] 4 SULIT

QUESTION 2 SOALAN 2 CLO 1 C1 a) List FIVE (5) Dimensions of Quality in quality control concept. Senaraikan LIMA (5) Dimensi Kualiti dalam konsep kawalan kualiti. [5 marks] [5 markah] CLO 1 C2 b) 100% inspection and sampling are the examples of inspection method used in industry in order to determine the quality of a product. Explain briefly both terms. Pemeriksaan 100% dan persampelan adalah contoh jenis pemeriksaan yang digunapakai dalam industri bagi menentukan kualiti sesuatu produk. Terangkan secara ringkas mengenai kedua-dua istilah tersebut. [4 marks] [4 markah] c) The voltage test data in a microcomputer for Resistant Company are presented in CLO 1 C2 and R chart (Table 4). Based on the chart, the company found that the process is out of control. There are 5 point outside the control limit in chart. Identify any possible causes and calculate the revised limits and central line for chart only. Given the subgroup size, n = 4. Data ujian voltan ke atas sebuah komponen microkomputer untuk sebuah Syarikat Resistant telah ditafsirkan seperti dalam carta kawalan dan R (Jadual 4). Berdasarkan carta tersebut, didapati bahawa proses syarikat tidak terkawal. Terdapat 5 titik berada diluar had kawalan bagi carta kawalan. Kenal pasti punca penyebab dan kirakan had kawalan baru dan garis tengah baru bagi carta kawalan sahaja. Diberi saiz subkumpulan, n = 4. 5 SULIT

Table 2(c) / Jadual 2(c) Subgroup Subgroup Number Number R (Bilangan (Bilangan R subkumpulan) subkumpulan) 1 482 32 11 469 25 2 506 24 12 474 24 3 465 32 13 484 24 4 469 26 14 476 22 5 474 24 15 485 23 6 484 24 16 520 23 7 476 28 17 458 25 8 513 23 18 469 24 9 502 24 19 474 23 10 469 26 20 484 25 R = 501 Diagram 2(c)(i) : Chart for data in Table 2(c) Gambarajah 2(c)(i): Carta kawalan bagi data Jadual 2(c) 6 SULIT

Diagram 2(c)(ii) : R Chart for data in Table 2(c) Gambarajah 2(c)(ii): Carta kawalan R bagi data Jadual 2(c) [6 marks] [6 markah] 7 SULIT

CLO 1 C3 d) Winson Paint Sdn Bhd has identified common car paint problem series such as cracking, chipping and dust contamination. They need to build a control chart on graph paper to monitor the number of nonconformities in order to eliminate the paint defect. The data of the painted cars with nonconformities have been recorded over the past 10 weeks in Table 5. Illustrate the recorded data in Table 5 using C-Control Chart on a graph paper. Syarikat Winson Paint Sdn Bhd telah mengenalpasti beberapa masalah ketika proses mengecat kereta, seperti masalah cat retak, cat nipis dan tertanggal, dan juga masalah habuk terlekat pada produk yang telah siap di cat. Mereka perlu membina carta kawalan bagi memantau bilangan kecacatan supaya dapat membasmi kecacatan ketika proses mengecat. Data bagi kereta yang mempunyai kecacatan telah direkodkan selama 10 minggu dalam Jadual 5. Ilustrasikan data tersebut dalam bentuk Carta Kawalan-C di atas kertas graf. Table 2(d) / Jadual 2(d) Week Number of Complaints Week Number of complaints (Minggu) (Bilangan Aduan) (Minggu) (Bilangan Aduan) 1 0 11 4 2 3 12 3 3 4 13 1 4 1 14 1 5 0 15 1 6 0 16 0 7 3 17 2 8 1 18 1 9 1 19 2 10 0 20 2 [10 marks] [10 markah] 8 SULIT

QUESTION 3 SOALAN 3 CLO2 C2 (a) Explain THREE (3) advantages and TWO (2) disadvantages of sampling. Berikan TIGA (3) kelebihan dan DUA (2) kelemahan persampelan. [5 marks] [5 markah] CLO2 C4 (b) ABS Electronics Sdn. Bhd. is using double sampling plan for a lot size, N = 6000, n1 = 80, c1 = 2 and r1 = 4, and n2 = 70, c2 = 5 and r2 = 6 to identify the quality for each radio in terms of weight per box before sending them to their customers. During the first sampling, it is found that 3 boxes of the samples are not conforming to the standard. ABS Electronics Sdn. Bhd. menggunakan rancangan persampelan duaan untuk mengenalpasti kualiti setiap kotak radio yang dihasilkan bagi bilangan lot, N = 6000, n1 = 80, c1 = 2 and r1 = 4, and n2 = 70, c2 = 5 and r2 = 6 sebelum dihantar kepada pelanggan. Namun pada persampelan pertama, 4 kotak didapati mengalami kecacatan. i. Explain on the sampling process, Huraikan proses persampelan yang dilalui, ii. Identify the condition that ABS Electronics Sdn. Bhd might face during the second sampling process, in terms of accepting or rejecting the lot. Tentukan keadaan yang mungkin dihadapi oleh ABS Electronics Sdn. Bhd. pada persampelan keduanya, iaitu keadaan yang menyebabkan radio diterima atau ditolak. [8 marks] [8 markah] CLO2 C2 (c) Identify FIVE (5) benefits of using cost of quality. Kenal pasti LIMA (5) kelebihan menggunakan kos kualiti. [5 marks] [5 markah] 9 SULIT

CLO2 C4 (d) QPR plant in Illinois produced millions of defective tires that resulted in thousands of accidents and 250 deaths. Before the results of investigation are revealed, QPR held a half-price clearance sale of defective tires in the Southeast U.S. Congress later discovered that QPR continued to manufacture the 500 radial tire after claiming they have stopped the production. This case of unethical conduct finally resulted in the withdrawal of 14.4 million tires and it costs QPR millions of dollars. Analyze the situation and explain on the cost of quality that involved and briefly explain your answer. Kilang QPR di Illinios menghasilkan berjuta tayar rosak yang mengakibatkan beribu-ribu kemalangan dan 250 kematian. Sebelum penyiasatan diketahui umum, pihak QPR telah mengadakan jualan gudang separuh harga bagi tayar rosak di tenggara Amerika Syarikat. Kemudian Kongres mendapati QPR terus mengeluarkan 500 radial tayar selepas mendakwa telah berhenti menghasilkannya. Kes tingkah laku yang tidak beretika ini akhirnya telah mengakibatkan penarikan balik 14.4 juta tayar dan membuatkan QPR mengalami kerugian jutaan dolar. Analisis situasi ini dengan menyatakan kos kualiti yang telibat dan huraikan secara ringkas jawapan anda. [7 marks] [7 markah] 10 SULIT

QUESTION 4 SOALAN 4 CLO2 C3 a) Quality Inspector is checking the total number of defects in a factory which is producing metal parts. The data collected is recorded in Table 6. Sketch a Pareto Chart for this data. Seorang Pegawai Kualiti memeriksa jumlah kecatatan di sebuah kilang yang menghasilkan plat besi. Data yang telah dikumpul direkodkan seperti di Jadual 6. Lakarkan Carta Pareto untuk data tersebut. Table 4(a) / Jadual (a) Defect (Kecacatan) Count (Kiraan) Roughness (Kekasaran) 115 Shape (Bentuk) 56 Dimension (Dimensi) 35 Material (Bahan) 24 Others (Lain-lain) 10 [7 marks] [7 markah] 11 SULIT

CLO 2 C4 b) Table 4(b) shows the causes for out-of specification Liner ID. Develop Ishikawa diagram based on the given information. Jadual 4(b) menunjukkan punca liner ID di luar spesifikasi yang telah ditetapkan. Bina carta Ishikawa berdasarkan maklumat yang telah diberikan. Table 4(b) / Jadual 4(b) Material Operator Fixturing Tooling Prior Operations (Bahan) (Operator) (Pelekap) (Peralatan) (Operasi Sebelum) -Composition -Training -Wrong Fixture -Vibration - Worn Centrifugal off-spec -Supervision -Wear -Wrong insert Casting Mold -Microstructure -Scheduling -Vibration Grade -Casting Defects [5 marks] [5 markah] CLO 2 C3 c) Quality audit is a periodic, independent, documented examination and verification of activities of a quality system to determine their conformity with the requirements of a quality standard such as ISO 9000. As a quality officer in food processing industry, classify FOUR (4) types of audit to be implemented based on the suitable situation. Audit Kualiti adalah pemeriksaan dan pengesahan aktiviti yang dilakukan secara berkala dan bebas didokumenkan untuk menentukan pematuhan mereka dengan keperluan standard kualiti seperti ISO 9000. Sebagai pegawai kualiti di industri pemprosesan makanan, klasifikasikan EMPAT (4) jenis audit yang perlu dilaksanakan bergantung dengan situasi yang sesuai. [8 marks] [8 markah] 12 SULIT

CLO 2 C4 d) Total Quality Control (TQC) is about maintaining the quality standards throughout the process. One of the advantages of TQC is it can reduce the warranty cost thus increase the profit for the company. As a quality officer, analyze the step to implement TQC in your company. Kawalan Kualiti Menyeluruh (TQC) adalah mengenai mengekalkan piawaian kualiti sepanjang proses tersebut. Salah satu kelebihan TQC ialah mengurangkan kos jaminan dan seterusnya meningkatkan keuntungan bagi syarikat. Sebagai seorang pegawai kualiti, aturkan langkah yang sesuai untuk melaksanakan TQC di syarikat anda. [5 marks] [5 markah]... END OF QUESTION SOALAN TAMAT 13 SULIT