21 May WHAT IS THE CRITICAL PATH AND TOTAL TIME REQUIRED FOR THIS PROJECT?
MM305 UNIT 9 PROJECT
Name: Cristen Lukan
Directions:
The following software may be used:
o Excel->Data Analysis
o Excel QM
o QM for Windows (PC only)
Please make sure to insert your answers, including any charts, graphs, or output, on this
document. You may be required to also upload original files from Excel or QM for
Windows.
The calculations are not your final answer. A summary/explanation in your own
word for each question posed should be included.
Question 8, 9 and 10 use the States Data File to run some calculations. Resulting output
is already provided for you. You do NOT need to run any calculations on the States Data
File.
Be sure to put your name on this document and save it to your computer. Upload this
Word document as your Unit 7 submission in the course Drop Box.
1. Allen Machines specializes in developing weed-harvesting equipment that is used to clear
small lakes of weeds. Allen Machines is contemplating the construction of a machine that
would harvest weeds on narrow rivers and waterways. The activities and time in weeks
necessary to build one of these experimental machines are shown in the table below.
Activity
A
B
C
D
E
F
G
H
Immediate Predecessors
none
A
B
B
C,D
A
D,E
D,F
Time in Weeks
3
5
4
3
2
1
2
3
1. What is the minimum possible time required for completing the project?
2. What is the latest possible time that Activity F may be started without delaying the
completion of the project?
3. What is the latest finish time for Activity H?
4. What is/are the critical path(s)?
Explanation: (Please include Gantt Chart and/or Network Graph):
1
MM305 UNIT 9 PROJECT
2. The following is the activity and associated costs for the renovation of the local high school
football stadium. The times are in weeks.
Explanation: You can enter the above information into QM for Windows->Project
Management,->Cost Budgeting.
Activity
A
B
C
D
E
F
G
H
Immediate Predecessor
A
C
A, B
E
C, D
F
Time
5
3
7
1
1
1
5
1
Cost ($)
10,000
25,000
15,000
30,000
20,000
12,000
56,000
20,000
1. What is the critical path and total time required for this project?
Answer:
Explanation: (include Gantt Chart and/or Network Graph):
2. How much of the total (cumulative) budget would be spent in Week 8 (Period 8) with the
earliest start budget?
Answer:
Explanation (include cost budgeting table):
2
MM305 UNIT 9 PROJECT
3. Precision Manufacturing has a government contract to produce stainless steel rods for use in
military aircrafts. Each rod is required to be 15 millimeters in diameter. Each hour, random
samples of size n = 5 rods are measured to check process control. Four hours of observations
yielded the following:
Explanation: You are looking at the control limits for the variable, average diameter. You can
use Excel QM or QM for Windows->Quality Control->x-bar and r-charts.
Time
9 A.M.
10 A.M.
11 A.M.
Noon
Rod 1
14.5
15.1
18.9
35
Rod 2
14.9
14.7
15
15.2
Diameter
Rod 3
17.9
13
17.9
32.1
Rod 4
16
15.4
18.3
18.1
Rod 5
15.9
14.9
16.5
15
1. Construct the xbar-chart and the R-chart.
Please include charts below:
2. Is the process in control?
xbar chart UCL =
R-chart UCL =
xbar chart LCL =
R-chart LCL =
Explanation:
3
MM305 UNIT 9 PROJECT
4. Modern Electronics specializes in manufacturing modern electronic components. It also
builds the equipment that produces the components. Modern Electronics is considering
building a new facility but the estimated profits would be impacted by the type of market that
develops. The probability for a strong market is 0.1; for a fair market is 0.3; and for a poor
market is 0.6. You are responsible for advising the president of Modern Electronics on the
type facility that should be built or to not build a facility at all. The table shows the estimated
profits under each market and for each size facility.
Explanation: You can use QM for Windows->Decision Analysis->Decision Table with the
above information.
Build a large facility
Build a medium-size facility
Build a small facility
Do not build a facility
Estimated Profits
Strong Market
Fair Market
550,000
150,000
500,000
125,000
250,000
75,000
0
0
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