Introduction

Your introduction is your opportunity to be at your most individual. You should get your reader’s attention immediately by announcing the paper’s subject or by launching into a relevant scenario or narrative that informs or illustrates your overall argument. A paper illustrating the costly effects of poor mine design, for instance, might open with the scenario of how a poorly designed pillar at a salt mine in Louisiana once collapsed, fracturing the surface above and draining an entire lake into the mine. A paper on the supply and demand of nickel might begin by straightforwardly announcing that the paper will explain the uses of nickel, detail its market structure, and use data to forecast the future supply and demand of the metal.

In brief, a paper’s introduction should define and limit the paper’s scope and purpose, indicate some sense of organization, and, whenever possible, suggest an overall argument. Another important principle in technical writing is that the introduction should be problem-focused, giving the reader enough background so that the paper’s importance and relationship to key ideas are clear. A rule of thumb about the introduction’s length: about 5-10% of the entire paper.

As examples of how creative an introduction can be, here are the opening lines from a geography paper and a paper on optics, both of which use narrative technique to arouse our interest. Note how the first excerpt uses an “I” narrator comfortably while the second excerpt does not use “I” even though the writer is clearly reflective about the subject matter. The first excerpt is from a paper on the generic nature of America’s highway exit ramp services; the second is from a paper on shape constancy.

The observation struck me slowly, a growing sense of déjà vu. I was driving the endless miles of Interstate 70 crossing Kansas when I began to notice that the exits all looked the same. . . .

Our eyes often receive pictures of the world that are contrary to physical reality. A pencil in a glass of water miraculously bends; railroad tracks converge in the distance. . . .

Thesis Statement / Objective

Most papers have outright thesis statements or objectives. Normally you will not devote a separate section of the paper to this; in fact, often the thesis or objective is conveniently located either right at the beginning or right at the end of the Introduction. A good thesis statement fits only the paper in which it appears. Thesis statements usually forecast the paper’s content, present the paper’s fundamental hypothesis, or even suggest that the paper is an argument for a particular way of thinking about a topic. Avoid the purely mechanical act of writing statements like “The first topic covered in this paper is x. The second topic covered is y. The third topic is . . .” Instead, concretely announce the most important elements of your topic and suggest your fundamental approach—even point us toward the paper’s conclusion if you can.

Here are two carefully focused and thoughtfully worded thesis statements, both of which appeared at the ends of introductory paragraphs:

This paper reviews the problem of Pennsylvania’s dwindling landfill space, evaluates the success of recycling as a solution to this problem, and challenges the assumption that Pennsylvania will run out of landfill space by the year 2020.

As this paper will show, the fundamental problem behind the Arab-Israeli conflict is the lack of a workable solution to the third stage of partition, which greatly hinders the current negotiations for peace.