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College of Administrative and Financial Sciences
Assignment 2
Deadline: 15/11/2019 @ 23:59
Course Name:
Student’s Name:
Course Code:
Student’s ID Number:
Semester: I
Academic Year: 1440/1441 H
For Instructor’s Use only
Instructor’s Name:
Students’ Grade: Marks Obtained/Out of
Level of Marks: High/Middle/Low
 The Assignment must be submitted on Blackboard (WORD format only) via allocated
 Assignments submitted through email will not be accepted.
 Students are advised to make their work clear and well presented, marks may be
reduced for poor presentation. This includes filling your information on the cover page.
 Students must mention question number clearly in their answer.
 Late submission will NOT be accepted.
 Avoid plagiarism, the work should be in your own words, copying from students or
other resources without proper referencing will result in ZERO marks. No exceptions.
 All answered must be typed using Times New Roman (size 12, double-spaced) font.
No pictures containing text will be accepted and will be considered plagiarism).
 Submissions without this cover page will NOT be accepted.
Learning Outcome:
 Understand the concept of process selection, forecasting, capacity planning,
production forecast methods and schedule operations.
 Apply knowledge and skills to optimize production objective of maximizing
profits using qualitative and quantitative techniques in related areas of
operations management.
 Exhibit the knowledge of lean system, quality controls and green systems
Assignment Question(s):
(Marks 5)
Question 1:
A company that makes car accessories. The company control its production
process by periodically taking a sample of 99 units from the production
line. Each product is inspected for defective features. Control limits are
developed using three standard deviations from the mean as the limit.
During the last 12 samples taken, the proportion of defective items per
sample was recorded as follows:
a. Determine the mean proportion defective, the UCL, and the LCL? (Marks
1) (word count maximum:150)
b. Draw a control chart and plot each of the sample measurements on it?
(Marks 1) (word count maximum:100)
c. Does it appear that the process for making tees is in statistical control?
(Marks 0.5) (word count maximum:100)
Question 2:
A Chemical Company estimates the annual demand for a certain product as
Demand 649
a. Forecast the demand for week 7 using a five-period moving average?
(Marks 0.5) (word count maximum:100)
b. Forecast the demand for week 7 using a three-period weighted
moving average. Use the following weights: W1 = .5, W2 = .3, W3
= .2.? (Marks 0.5) (word count maximum:100)
c. Forecast the demand for week 7 using exponential smoothing. Use an
α value of .1 and assume the forecast for week 6 was 602 units?
(Marks 1) (word count maximum:100)
d. What assumptions are made in each of the above forecasts? (Marks 0.5)
(word count maximum:150)

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