Answer Happy

b) SULIT Yummy Food Sdn. Bhd. is updating their machinery and manufacturing process. Their engineer recorded the number of nonconformities in their products as shown in Table 3 (d). Trial version of the c control chart has been plotted and it is found that c-bar is 6.2, UCL is 13.67, and LCL is 0.00. Recalculate the centreline and control limits of the revised c chart. Yummy Food Sdn. Bhd. sedang menaiktaraf mesin dan proses pembuatan mereka. Jurutera syarikat berkenaan mencatatkan kecacatan pada produk yang dihasilkan seperti dalam Jadual 3(b). Carta kawalan c (percubaan) mendapati c-bar adalah 6.2, HKA adalah 13.67 dan HKB adalah 0.00. Kira semula garisan tengah dan had-had kawalan carta kawalan c (Pembaikan). Sample No. ________. 101 103 104 105 107 110 113 114 117 118 120 123 125 127 c 7 3 5 4 6 6 6 Table 3(b)/Jadual 3 (b) DJF51082: QUALITY CONTROL Comment/Komen 17 Wrong mold used / Acuan salah 7 2 0 3 4 Loose handle/ Pemegang longgar 2 0 SULIT 130 21 Insufficient time in mold / Kekurangan masa dalam acuan 131 3 133 2 134 18 Being too long in mold/ Terlalu lama dalam acuan 136 5 140 9 [6 marks] [6 markah]
c) d) Sample No. 101 103 104 105 107 110 113 114 117 118 120 123 125 127 130 131 133 134 3 5 4 6 4 6 17 Wrong mold used / Acuan salah 7 2 0 3 2 0 Table 3(b)/Jadual 3(b) Comment/Komen 136 5 140 9 Loose handle/ Pemegang longgar 21 Insufficient time in mold/ Kekurangan masa dalam acuan 3 2 18 Being too long in mold/ Terlalu lama dalam acuan [6 marks] [6 markah] Discuss briefly the switching rules between normal, tightened and reduce inspection. Bincangkan secara ringkas peraturan pertukaran di antara pemeriksaan biasa, ketat dan ringan. [5 marks] [5 markah] Given N=2000, AQL and Level of product is I, acquire the code letter, the value of n (number of sample), Ac (Acceptance Value) and Re (Reject Value) for Single Sampling Plan (Normal Inspection, Tightened Inspection and Reduce Inspection) from the MIL-STD-105D table.