You already do so for the overall structure of the body (the sections) in the object of the document at the end of the Introduction. What is special, unexpected, or different in your approach?
(Papers reporting something other than experiments, such as a new method or technology, typically have different sections in their body, but they include the same Introduction and Conclusion sections as described above.) Although the above structure reflects the progression of most research projects, effective papers typically break the chronology in at least three ways to present their content in the order in which the audience will most likely want to read it.
First and foremost, they summarize the motivation for, and the outcome of, the work in an abstract, located before the Introduction.
In a sense, they reveal the beginning and end of the story — briefly — before providing the full story.
Second, they move the more detailed, less important parts of the body to the end of the paper in one or more appendices so that these parts do not stand in the readers' way.