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Definition of a Technical Report

Technical reports present facts and conclusions about your designs and other projects. Typically, a technical report includes research about technical concepts as well as graphical depictions of designs and data. A technical report also follows a strict organization. This way, when other engineers read what you write, they can quickly locate the information that interests them the most.

Audience

As a student, you might assume that your technical report's audience is your instructor, however, this may not always be the case. Your instructor may ask you to produce a report for your peers or for other engineers. However, you shouldn't always assume that your audience has a strong engineering background or is familiar with the engineering terminology you use. Always check with your instructor to know who your audience is.

As an engineer in the field, the most likely audience for the technical reports you produce is other engineers with a background similar to yours. This audience is more likely to understand the terminology you use. However, you should always evaluate who your readers will be before assuming they will understand your jargon. Consider how your readers will use your report. For instance, you might submit a technical report to a publication or your technical report may present a specific design. The audiences in each situation have different needs. Audiences may read the publication for information and insight while audiences reading about your specific design may critique your design or make decisions based on its content.

General Format

Technical Reports have an organized format because a majority of your audience may not read the entire report in one reading. This specific format allows readers to quickly locate the information they need.

Most technical reports include the parts listed below. However, you may be required to include or exclude specific sections. Be sure to check with your instructor before using the format outlined here.

• Transmittal Letter
• Title Page
• Abstract
• Executive Summary
• Table of Contents
• List of Figures & List of Tables
• Report Body
• References
• Appendices

Transmittal Letter

Transmittal letters often accompany reports and inform readers of a report's context. Typically, the letter includes information not found in the report. For example, the letter contains information about the particular project and/or due dates. A Transmittal Letter is a business letter and should be formatted accordingly; that is, you should include the recipient's address, your address, a salutation and closing. Depending on the project, you may also need to include contact information. Always check with your instructor to determine whether or not you should attach a transmittal letter to your report.

• Example Transmittal Letter

Title Page

A technical report should always include a title clearly identifying the report. A title should be descriptive and accurate, but not wordy, verbose or too terse.

• Example Title Page

Abstract

The Abstract is extremely important because it helps readers decide what to read and what to pass over. The idea of the Abstract is to give readers an honest evaluation of the report's content, so they can quickly judge whether they should spend their valuable time reading the entire report. This section should give a true, brief description of the report's content. The most important purpose of the Abstract is to allow somebody to get a quick picture of the report's content and make a judgment.

Since an Abstract is a brief summary of your report, its length corresponds with the report's length. So, for example, if your report is eight pages long, you shouldn't use more than 150 words in the Abstract. Generally, Abstracts define the report's purpose and content.

• Example Abstract

Executive Summary

Typically, Executive Summaries are written for readers who do not have time to read the entire technical report. An executive summary is usually no longer than 10% of the report. It can be anywhere from 1-10 pages long, depending on the report's length. In the executive summary, you should summarize the key points and conclusions from your report. You might include anexecutive summary with your report, or the summary can be a separate document.

Some reports only include an abstract while others include an executive summary. Always check with your instructor to determine which to include or if you should include both.

• Example Executive Summary

Table of Contents

A Table of Contents includes all the headings and subheadings in your report and the page numbers where each of these begins. When you create a Table of Contents, one of the most important decisions you have to make involves design. A good Table of Contents distinguishes headings from subheadings and aligns these with the appropriate page numbers. This also means you should pay attention to capitalization, spacing, and indentation.

• Example Table of Contents

List of Figures and List of Tables

These two separate lists assist readers in locating your photos, drawings, tables, graphs and charts. Like the Table of Contents, you need to present both of these in an organized, appealing format. Typically, you can shorten a figure or table's title when you create these lists.

• Example List of Figures
• Example List of Tables

Report Body

In a technical report, the body typically presents an Introduction, various other sections, depending on your topic, and a Conclusion. Throughout the body, you should include text (both your own and research from other sources), graphics, and lists. Whenever you cite information or use graphics from another source, you must credit these sources within your text. Check with your instructor to know which reference style to use.

• Example Report Body

References

Whenever you cite information (this includes graphics) from another source, you must credit the source in your References. Always check with your instructor to determine which reference style to use.

• Example References

Appendices

Appendices include information that is too large to fit within your report, yet information necessary to your report. For example, large graphics, computer print-outs, maps, or sample codes are best placed in Appendices. When making decisions about what to place in an Appendix, consider whether or not the material interrupts the reading flow. For instance, six pages of calculations would obviously cause readers to loose their train of thought. Appendices always appear at the end of a report.

• Example Appendices

Graphics

Graphics provide illustrated information to readers. In general, graphics are designed to make it easier for readers to understand your report. Deciding when to insert a graphic depends on the information you need to convey. For example, as you're writing your report, you find yourself struggling to describe a complex concept. Fitting your description within a few paragraphs is impossible, so you decide to create a graphic. Often, graphics are useful when concepts, designs, or processes are too complex or cumbersome to describe in written or oral form.

Perspectives on Technical Reports

Dave Alciatore, Mechanical Engineering

• Writing Technical Design Reports as a Group
• Report Content

• Multiple Reports for a Project
• Report Content

• An Example Technical Report
• Your Report's Purpose

Writing Technical Design Reports as a Group

Dave Alciatore, Mechanical Engineering

Often, technical design reports require that multiple experts help write them. This is called "concurrent engineering." This way, everyone involved with a project contributes. More ground gets covered this way. The report is also a good way to document a design. Then, if problems arise later, everyone can refer to the document. This helps determine where changes were made, etc.

Report Content

Dave Alciatore, Mechanical Engineering

Every company has different means of documentation. Typically, in industry, you won't have to provide as much history in a technical report. This is because in academia, we want you to document your thought processes and project evolution. In industry, you will concentrate more on the initial problem, requirements, and solutions.

Multiple Reports for a Project

Neil Grigg, Civil Engineering

Suppose your engineering task is to build a retaining wall. As the main engineer, you've got to consider many aspects: the load, the height, the structural design. You'll write a report where you state the goals and how they will be accomplished. This includes input parameters, the conditions in which you have to work, alternatives, recommendations. Next, soil engineers may actually test the soils at the location. They would then produce a report about what they found. Every project generates multiple reports.

Report Content

Neil Grigg, Civil Engineering Professor

Many designs begin with identifying the problem, determining the goals, and creating a list of alternatives. The next part is the evaluation. This includes the technical, legal, economic, financial, environmental, and social evaluations. Then you make recommendations based on these evaluations. Most reports, especially design reports include this information.

An Example Technical Report

Tom Siller, Civil Engineering Professor

I once helped produce a report about rock fracturing for a whip site. In that report, we stated the situation, how we would analyze the situation, (because we wanted to be hired as the engineers for the project), the analytical tools we would develop, and our results based on those analytical tools. We did not present a shaft design. Overall, the report presented our way of understanding the issues that would help design a shaft.

Your Report's Purpose

Tom Siller, Civil Engineering Professor

If your report's purpose is to create an artifact, then you have to present all the technical aspects of the design. This way, someone can read the report and build your artifact. You have to be aware of very fine details whenever you write a report. For instance, will your designs receive public approval? Are you in compliance with regulatory agencies? And so why you are writing the report helps you determine what details to include and exclude.

Example Technical Report

As you read the example, keep in mind that this technical report was a requirement for CE208 at Colorado State University. The course instructor, Dr. Tom Siller, commented on this document. Other instructors or job situations may have different opinions or require a different format. To view the example, choose the item below:

• Transmittal Letter
• Title Page
• Abstract
• Acknowledgments
• Executive Summary
• Table of Contents
• List of Figures
• List of Tables
• Report Body
• References
• Appendices

Transmittal Letter

Note: Your project report should be double spaced.

December 12, 1996

Dr. Tom Siller
Colorado State University
Fort Collins, CO 80524

Dear Mr. Siller:

We are submitting to you the report, due December 13, 1996, that you requested. The report is entitled CSU Performing Arts Center. The purpose of the report is to inform you of our design decisions for the center. The content of this report concentrates on the structural and acoustical aspects of the CSU Performing Arts Center. This report also discusses cable-stayed technology. If you should have any questions concerning our project and paper please fell free to contact Mike Bridge at 491-5048.

Sincerely,
Mike Bridge
Lead Engineer

Title Page

Project Engineers: Mike Bridge

Alice Lake
Simon Civil
Karen Nuclear

Abstract

Note: Your project report should be double spaced.

Abstract

Acknowledgments

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Acknowledgments

Excecutive Summary

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Introduction

Location

Main Hall Acoustics

Conclusion

Table of Contents

Note: Your project report should be double spaced.

Table of Contents

Acknowledgments................................i

Abstract..............................................ii

Executive Summary.............................iii

List of Figures..................................iv

List of Tables....................................v

Introduction.........................................1

Location..............................................3

Cable-Stayed Technology.....................5

Acoustics............................................8

Floor Plans........................................12

Conclusion........................................16

References.......................................17

List of Figures

Note: Your project report should be double spaced.

List of Figures

Figure 2.1

map of campus.................................4

Figure 3.1

bridge diagram.................................6

Figure 3.2

building diagram...............................6

Figure 3.3

Alamodome......................................7

Figure 4.1

balcony design...............................11

Figure 5.1

basement level floor plan.................13

Figure 5.2

ground level floor plan.....................14

Figure 5.3

second level floor plan....................15

List of Tables

Note: Your project report should be double spaced.

List of Tables

The List of Tables is missing from this project report.

Report Body

Note: Your project report should be double spaced.

Introduction

We at MASK Engineering believe that this project will greatly benefit both the CSU campus and the surrounding Fort Collins community. Such a facility will lead to the improvement of the performing arts programs on campus. It will directly affect the students and professors in the music, theater. and dance programs at the university, eventually increasing enrollment in these disciplines. There are approximately 230 students in the performing arts programs at CSU right now. The amount of space that is available to these students is inadequate for their performances. The construction of this complex will not only provide them with the space they need, but will also continue the growth of these programs, making CSU a leader in the education of the performing arts.

These changes at the university will result in a heightened cultural awareness in the community. Currently, community events are held at the Lincoln Center, while CSU sponsored events are held at the Lory Student Center theater. A new facility will bring community and university events together and will allow a greater variety of outside events to be brought to Fort Collins. The location of this complex on campus will bring a greater number of students to these events due to the elimination of transportation problems.

MASK Engineering has focused on the structural and acoustical aspects of the CSU Performing Arts Center, while hiring other firms to handle the parking, mechanical and electrical operation, and utilities. A cable-stayed support system has been chosen, and a floor plan has been drawn up that will produce the best acoustical results. A. L. handled the acoustical aspects of the complex, while S.C., K.N., and M.B. concentrated on the structural plans. We are planning for the construction of this complex to begin within the next few years.

Location

We have considered possible disturbances that the construction of the performing arts center on this plot might cause. Due to the close proximity of Green Hall to Allison Hall and Parmelee Hall, we have decided to begin construction early in the summer, after classes have ended. Green Hall will be torn down first, and construction of the performing arts center will begin immediately. This will allow us a good start on the project while students are not living in the nearby residence halls. According to the front desk at Braiden Hall,, which is located near the Morgan Library construction site, residents do not have a problem with noise and there have been no complaints of disturbances. MASK Engineering believes that this will be the case for the residents in Allison and Parmelee when they return in the fall as the performing arts center is finished.

Figure 2.1

Cable-stayed Technology

A cable-stayed support system was chosen for the design of the CSU Performing Arts Center. One reason for choosing this system was to allow for a more compact facility because the space available on campus was limited. Another reason was to give patrons an unobstructed view of events by eliminating the need for columns. engineers established the design of cable-stayed bridges in the 1950's and 1960's. This technology was eventually adapted to buildings, using cables to support the roof. Each tower is buttressed by two sets of cables, transferring the load into the ground. Without a roof load to support, columns are not needed in the complex and the space can be used in more ways.

The concept behind cable-stayed technology is to have the supporting reactions to the load directed in only vertical directions as opposed to vertical and horizontal. It also eliminates any tension and/or compression force (Figures 3.1 and 3.2) . For a building, the load of the roof is directed through the cables, to the towers, and down to the ground. The walls do not support the roof as they normally would; only the cables are used to hold up the roof. An example of a cable-stayed building is the Alamodome, a multipurpose stadium in San Antonio, Texas (Figure 3.3). Our model is based on this design.

Figures 3.1-3.2

Figure 3.3

Main Hall Acoustics

Background
One of the key characteristics of a concert hall that greatly influences sound quality, is its reverberation time (the time before the decay of the reflected sound ). For orchestral or band music, the ideal reverberation time is approximately two seconds. Any times approaching 1.6 seconds will lead toward a dry, dead sound ( Beranek 1962 ). The other extreme is a time that is too long. This causes the music to lose its clarity, an excessive loudness, and the blending of incompatible chords ( Beranek 1962 ). A hall's reverberation time can be affected by such things as the volume of the room or the number of people in the audience. In the construction of the main hall for the CSU Performing Arts Center a balance will be determined that will create a reverberation time of two seconds, as independent of audience size as possible.

Sound quality is also greatly determined by the warmth of the sound. Warmth is determined by the fullness of the bass tones. If the middle frequencies of a sound have longer reverberation times than the low tones, then the sound will become brittle (Beranek 1962 1).

Materials
Table 4.1 gives the absorption coefficients of different frequencies for common surfaces. It shows that materials such as heavy curtains or thick carpet absorb are the ideal choice for decreasing the intensity of higher frequencies. This leads to the production of a more full, warm sound. Retractable banners will be built into the ceiling, and can be lowered to create this effect. Cloth seats will be used as they best assimilate an occupied audience area ( Beranek 1962 ). This allows sound within the hall to be independent of audience size. The low sound absorbance of plaster also makes it ideal for the creation of the desired reverberation time of two seconds.

Design considerations
The intensity of the direct sound should not be too weak, but at the same time, it must not become uncomfortably loud. This problem will be dealt with by limiting the length of the room, and by designing the surfaces above and around the stage to project the sound evenly throughout the concert hall. Another problem arises with the seats placed under a balcony. To prevent a muddiness within the sound, the depth under the balcony should not exceed the height of the opening beneath the balcony, as shown in figure 4.1 ( Beranek 1962 ).

Table 4.1
Absorption coefficients of different frequencies for main hall surfaces

	Frequency ( Hz )
Surface	125	250	500	1000	2000	4000
heavy fabric	0.14	0.36	0.57	0.72	0.70	0.62
heavy carpet on concrete	0.02	0.06	0.16	0.37	0.59	0.64
cloth seats	0.44	0.60	0.76	0.87	0.80	0.70
plaster on brick	0.01	0.01	0.01	0.02	0.04	0.06

Table based on: Beranek, L. 1966. Music, Acoustics, & Architecture. John Wiley and Sons, Inc., New York.

Figure 4.1
Balcony design

Figure based on: Beranek, L. 1966. Music, Acoustics, & Architecture. John Wiley and Sons, Inc., New York.

Floor Plans

The Colorado State University Performing Arts Center consists of three levels. The total area of the complex is 56,500 square feet. The basement and ground floors consist of 20,500 square feet apiece. The second floor has a square footage of 15,500.

The basement level of this center (Figure 5.1 ) includes two main dressing rooms with shower facilities as well as four private dressing rooms with individual restrooms for guest performers. The mechanical room for the building will be in the basement, housing such devices as the heating, ventilating, and air conditioning equipment as well as the mechanics for the elevator. A spacious performers' lounge has also been added in to the basement to provide a relaxing environment for the center's performers.

The building's main floor (Figure 5.2 ) includes the main performance hall as well as a small rehearsal hall. The main hall is 5,000 square feet and has a seating capacity of 1,200. A coffee shop and art lounge have been included in this plan for the enjoyment and convenience of the patrons. A large classroom is provided for dance classes as well as rehearsals. Sufficient office space is included adjacent to the center's box office.

The top floor of the CSU Performing Arts Center (Figure 5.3 ) includes a walk- around balcony overlooking the main lobby as well as a balcony for the main performance hall. An elevator is provided for travel between the first and second floors. A recording studio is also located on this floor as an added bonus.

Figure 5.1
Basement level floor plan

Figure 5.2 Ground Level

Figure 5.3 Second level floor plan

Conclusion

In conclusion, MASK Engineering has carefully planned out the details of the proposed CSU Performing Arts Center. This facility will be a benefit to the performing arts programs at CSU, the students and faculty of CSU, as well as the members of the community. It will allow for the improvement of programs in the area and growth of interest in cultural events. The site of Green Hall will be accessible to both students and the community, and will use the space on campus most efficiently, preserving the green areas. A cable-stayed support system for the roof will allow for a compact facility and an unobstructed view for patrons. In order to achieve the best acoustical results in the main performance hall, we have designed a rectangular hall made of plaster. We have also designed the hall so that the depth under the balcony does not exceed the height of the opening beneath the balcony. The total area of the complex will be 56,500 square feet split into three levels. The main hall will have a seating capacity of 1,200. The facility contains necessary rooms to accommodate the performers, and several rooms to make the visit of the patrons more enjoyable.

Through our research and planning, MASK Engineering recommends that the construction of the proposed CSU Performing Arts Center begin as soon as plans have been finalized and conditions permit. We expect this complex to benefit not only the performers, but also CSU students and all residents of Fort Collins.

References

Note: Your project report should be double spaced.

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References

Baranek, L. Music, Acoustics, & Architecture.  New York: John Wiley and Sons Inc.,

	1966.



Kosman, Josh. "The Rest of the Best." Civil Engineering, July 1994, 44-48.



Newhouse, Elizabeth L., ed. The Builders: Marvels of Engineering. Washington D.C.: 

	The Book Division, National Geographic Society, 1992, 50, 74-5.

Appendices

Note: Your project report should be double spaced.

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There are no Appendices in this Example Project Report.

Additional Resources

Reference units are available to help you write a technical report. Choose any of the following for more information:

• Purpose
• Audience
• Civil Engineering Citation Guide
• Writing Abstracts
• Writing Executive Summaries