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Statistical Process Control, SPC
All calculations shall be executed via MS Excel formulas/functions.
Data I
A manufacturing operation has collected 16 samples containing 110 observations each. The components
are evaluated based on a defective, or nonconforming state.
1) List the Control Chart Type: P-Chart
2) Calculate the Target, LCL and UCL (z = 3)
Target:
0.18295
UCL:
0.29395
LCL:
0.07195
3) List All Samples Yielding Corrective Action: None
Data II
An aircraft overhaul shop has collected data on aircraft that have been overhauled and released for final inspection upon return to service. The discrepancies are typically resultant from abnormal vibration, fluid leaks and electrical malfunctions. Using 20 samples, or aircraft, discrepancies per aircraft have been recorded. 1) List the Control Chart Type: C-Chart
2) Calculate the Target, LCL and UCL (z = 3)
Target:
3.9
UCL:
9.82
LCL:
-2.02 (0) 3) List All Samples Yielding Corrective Action: None
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To=1
Toowwww
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Tx2
T₂ T3
www www
R₁ R₁ R₂
www.T
R₂
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10
Micrometer
Fixed mounts
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xx_w_
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E
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Ayad A. M.
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30
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د ميکانيك شهري 2021.pdf
UNIVERSITY OF BASRAH - COLLEGE OF ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING
Subject: Engineering Mechanics-Static
Class: 1st year, 1st term
Exam. : Semester
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Examiner: Dr. Mazin, Dr. Aqeel, Dr.Ahid and Dr.Jaffar
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% Sample data for Diesel and Petrol cars
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- You are a biomedical engineer working for a small orthopaedic firm that fabricates rectangular shaped fracture fixation plates from titanium alloy (model = "Ti Fix-It") materials. A recent clinical report documents some problems with the plates implanted into fractured limbs. Specifically, some plates have become permanently bent while patients are in rehab and doing partial weight bearing activities. Your boss asks you to review the technical report that was generated by the previous test engineer (whose job you now have!) and used to verify the design. The brief report states the following... "Ti Fix-It plates were manufactured from Ti-6Al-4V (grade 5) and machined into solid 150 mm long beams with a 4 mm thick and 15 mm wide cross section. Each Ti Fix-It plate was loaded in equilibrium in a 4-point bending test (set-up configuration is provided in drawing below), with an applied load of 1000N. The maximum stress in this set-up was less than the yield stress for the Ti-6Al-4V…arrow_forwardProblem 3: Insulation To=1 Toowwww Steam Tx2 T₂ T3 www www R₁ R₁ R₂ www.T R₂ Steam at T1 = 320 °C flows in a cast iron pipe (k= 80 W/m. °C) whose inner and outer diameters are 5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection and radiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficient inside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation. The determination is based on a unit length of the pipe (L = 1 m). Assumptions 1. Heat transfer is one-dimensional since there is no indication of any change with time. 2. Heat transfer is one-dimensional since there is thermal symmetry about the centreline and no variation in the axial direction. 3. Thermal conductivities are constant. 4. The thermal contact resistant at the interface is…arrow_forwardHartley Electronics, Inc., in Nashville, producesshort runs of custom airwave scanners for the defense industry.The owner, Janet Hartley, has asked you to reduce inventory byintroducing a kanban system. After several hours of analysis, youdevelop the following data for scanner connectors used in onework cell. How many kanbans do you need for this connector?Daily demand 1,000 connectorsLead time 2 daysSafety stock 12 dayKanban size 500 connectorsarrow_forward
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