Communications Question
After the completion of IDL3 preliminary and final assignments, you will have completed a probabilistic analysis and presented the findings in a memorandum in the role of a Forensic Engineer. This document will be sent to the Court involved with a class action lawsuit that involves the product you will be evaluating. For this purpose, you will address your memorandum to the Judge. However, it must be understandable to the jury who will reference it, and it is also likely to be referenced by the lawyers on both sides of the litigation.
problem:
In 2021, a wildfire burned more than 10,000 acres in Presley, a small city on the edge of Florida’s Everglades. The fire damaged 86 homes, businesses, and other structures and caused over $40 million in damages. Wildfires require certain environmental conditions to spread, but the initial sparks sometimes come from electrical utility equipment and power lines. An investigation found that the origin of the Presley fire was a transmission tower, where one of the rows of hanging insulators had fallen to the ground. The insulators are designed to protect the tower from the electrical current flowing through the power lines, and they are hung with metal rings, called C-hooks. These C-hooks were manufactured by Seaborne Iron Works, Inc, who claims that the hooks should not wear more than 5 mm over a fifty-year lifespan. In cooperation with the power company, an independent investigator was hired by the city of Presley to collect data on a random sample of the C-hooks at various transmission towers in the area. It was found that several of the hooks were eroding at a faster rate than was promised by the Seaborne Iron Works when the local electric company purchased and installed them in the 1979.
The local utility company has blamed Seaborne Iron Works, Inc. for manufacturing parts that have worn prematurely. Civil litigation against the manufacturer has ensued, and a class-action lawsuit has been brought forth. In a class-action lawsuit, a certified group of individuals – a group called Presley Homeowners, in this case – sues the defendant for financial damages. The judge in this case has requested an impartial expert witness, and you have been brought in as a forensic engineer. Forensic engineers investigate the causes of failure in engineering projects ranging from faulty machinery to collapsed buildings. You will analyze the data you have collected and come to a statistically informed conclusion with a confidence level of 99% on whether the C-hooks used on transmission towers in Presley have passed their recommended wear of 5.0 millimeters.
The data provided by the independent investigator is below. Because it would be infeasible to test every C-hook in the area, eight transmission towers (labeled in the first column) were randomly selected, and the level of wear on the six C-hooks on each tower was measured. Does this sample data suggest that the average C-hook supplied by Seaborne Iron Works has passed 5.0 mm in wear?
You will provide your findings in a memorandum addressed to the judge, Tonye Wasilic, and copied to the defense attorney, Michael Solara, and the plaintiffs’ attorney Amena Hernandez. Remember that you are writing to convince the jury.
Review and evaluate the problem presented –Using the tools learned in IDL 3 evaluate the problem:what you know, the significance of what you know to the problem, and what information you have that can be used in a statistical problem. Determine the appropriate hypothesis test to use, given what input you have, the problem, and the statistical tools you have learned. Additionally, determine the appropriate use of the null and alternative hypotheses for the problem. If it helps you can sketch a diagram of the problem.
Complete the calculation –Complete the statistical analysis of the problem. Be clear that you understand all of the processes you have completed to get your answer, you will have to document it.
Develop your document for the assigned audience and purpose – As you will have templates to use with many professional documents you will create, this assignment has a format that you must follow
Memorandum Header– This section of the document provides the information a reader needs to know to determine if they need to read the rest of the document. It must be consistent in layout and format so that it is easy to read. This section is graded on your ability to follow directions.
TO –The person you have been asked to address the memorandum to. Follow the exemplar, on paper a judge’s title is ‘Honorable’.
Why?This section and the CC section may be addressed to one or more person(s). The amount of information included for each is dependent on an organization’s level of formality and the role of hierarchy in the organization. National culture may also play a role in these decisions, as some may place greater importance on titles (such as Mr., Dr., or General). The person’s role title is often included, as it will dictate what type of information they need from you. Finally, the location of the addressee can be included, when it also suggests the type of information the document will include. When in doubt, it is better to be more formal and include too much information than to find out it was needed but not included.
CC –Emulate the format of the example. The name of each person being addressed is on a new equally indented line.
FROM –Emulate the format of the example. Use your name, your title is Forensic Engineer
DATE – Use the due date of the assignment format as Month, day, year (i.e June 22, 2022).
RE – For a lawsuit, this will have the suit name and then what it is about relative to the lawsuit.
Question Presented – Present specifically, and concisely the question you are being asked to address. This question must include a technical and legal component.
Brief Answer– Present specifically, and concisely the answer you got from your analysis. This answer must include a technical and legal component. The answer will not have details on your analysis or numeric outcomes.
Facts –This section will present the input you were given by presenting the context, the data and its meaning in the context, and how this input allows you to structure an analysis to determine an answer. It will not proceed into the analysis.
Discussion– This section presents the logic on how you analyzed the problem in language a non-technical audience can understand, starting with the most basic reasoning for the use of this analysis for the problem. This section will end with what you found through your analysis and what it means for the case.
Conclusion– This summarizes the entire document ending with the outcome of your analysis and its meaning to the case.
Appendix – This section is on its own page (use ‘insert/page break). For this section type out the mathematics, you used to calculate an answer in detail, ending with the outcome, what it means for the hypothesis test and the case.
Document Length:Well done documents are generally 3 – 4 pages; 1.5 – 2.5 pages for the main part of the memorandum and 3/4 – 1 page for the appendix. Documents shorter than this are likely not well done.
IDL 3 Data Set
Transmission tower
A-13
A-13
A-13
A-13
A-13
A-13
A-21
A-21
A-21
A-21
A-21
A-21
A-24
A-24
A-24
A-24
A-24
A-24
A-49
A-49
A-49
A-49
A-49
A-49
B-2
B-2
B-2
B-2
B-2
B-2
B-14
B-14
B-14
B-14
B-14
B-14
B-27
B-27
B-27
B-27
B-27
B-27
B-41
B-41
B-41
B-41
B-41
B-41
C-hook number
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Wear (mm)
4.1
4.8
3.1
3.4
3.5
3.5
4.6
5.1
5.5
3.4
6.2
5.4
3.2
4.0
6.1
6.2
6.1
4.9
3.8
3.7
4.1
3.5
3.4
2.9
3.2
2.7
4.1
2.8
3.0
4.1
4.0
5.2
4.6
5.1
3.9
4.0
5.3
5.6
5.2
4.7
6.1
4.9
5.8
6.3
5.4
5.2
4.3
4.6
IDL 3 Data Set
Transmission tower
A-13
A-13
A-13
A-13
A-13
A-13
A-21
A-21
A-21
A-21
A-21
A-21
A-24
A-24
A-24
A-24
A-24
A-24
A-49
A-49
A-49
A-49
A-49
A-49
B-2
B-2
B-2
B-2
B-2
B-2
B-14
B-14
B-14
B-14
B-14
B-14
B-27
B-27
B-27
B-27
B-27
B-27
B-41
B-41
B-41
B-41
B-41
B-41
C-hook number
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Wear (mm)
4.1
4.8
3.1
3.4
3.5
3.5
4.6
5.1
5.5
3.4
6.2
5.4
3.2
4.0
6.1
6.2
6.1
4.9
3.8
3.7
4.1
3.5
3.4
2.9
3.2
2.7
4.1
2.8
3.0
4.1
4.0
5.2
4.6
5.1
3.9
4.0
5.3
5.6
5.2
4.7
6.1
4.9
5.8
6.3
5.4
5.2
4.3
4.6
MEMORANDUM
TO:
CC:
FROM:
DATE:
RE:
Question Presented
Brief Answer
Facts
Discussion
Conclusion
1
Appendix A – Statistical Calculation
2
ME MORANDUM
TO:
Honorable Waya Thlocco
CC:
William Buckley, Clerk of the Court
Maria Morgan, Plaintiffs’ Counsel
Juan Gomez, Defendant’s Counsel
FROM:
Mariaelena John, Engineering Expert Witness
DATE:
July 23, 2021
RE:
Daylen v Blat Company, Engineering Expert Witness
Question Presented
Did the wiring in the Blat Company NueAir air purifier fabrication fail to meet industry
safety standard leading to fires in customers’ properties, making the manufacturer liable for
customers’ fire losses?
In this section, you will provide a complete, concise, and grammatically correct statement of the legal
question.
Brief Answer
Blat Company is liable for customers’ fire damage losses, as the company’s NueAir product
has been shown to likely be out of compliance with industry safety standards.
In this section, you will state your finding on the answer to the legal question completely, concisely. and
grammatically correct.
Facts
In this section, you will present 1) the context of the case; 2) the data you were provided and its
meaning to the case; and 3) how what you were provided will enable you to determine your
recommendation. Organize this to read in a way that the readers will understand the issue at the heart
of the case and the importance of the input information in addressing the question arising from the
issue. Remember the readers are likely not statisticians, engineers or computer scientists.
Discussion
In this section, you will provide a plain language, the logic of your approach to addressing the case
(why does this approach allow you to make a determination on this case?), what you know from your
analysis of the data and your finding. End with a statement of your recommended judgement on the
case. DO NOT walk the jury through your math, they will not understand it.
Conclusion
1
In this section, you will provide a synthesis of the entire memorandum, being sure to include the
answer to the legal question.
2
Appendix A – Statistical Calculations
Include in this section a typewritten copy of your calculations. Organize them in a way that
the steps you took are clear for the reader to see. Start with what you know and how you
will approach the problem. End with the mathematical answer, what it means statistically,
and what it means for the case.
3
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