Start by stating the actual situation (what we have) as a direct continuation of the context.
If you feel you must explain recent achievements in much detail — say, in more than one or two paragraphs — consider moving the details to a section titled State of the art (or something similar) after the Introduction, but do provide a brief idea of the actual situation in the Introduction. Emphasize the contrast between the actual and desired situations with such words as but, however, or unfortunately.
Try this test: Choose someone who knows next to nothing about your subject, give her or him a draft of your paper, and get the reader to construct an organogram (also known as an organizational chart) from all the headings you have used.
If he or she can construct such a chart with each heading in its right place, pat yourself on the back.
One elegant way to express the desired part of the need is to combine it with the task in a single sentence.
This sentence expresses first the objective, then the action undertaken to reach this objective, thus creating a strong and elegant connection between need and task.To this end, they must emphasize both the motivation for the work and the outcome of it, and they must include just enough evidence to establish the validity of this outcome.Papers that report experimental work are often structured chronologically in five sections: first, Introduction; then Materials and Methods, Results, and Discussion (together, these three sections make up the paper's body); and finally, Conclusion.To be accepted by referees and cited by readers, papers must do more than simply present a chronological account of the research work.Rather, they must convince their audience that the research presented is important, valid, and relevant to other scientists in the same field.They are more likely to be cited by other scientists if they are helpful rather than cryptic or self-centered.Scientific papers typically have two audiences: first, the referees, who help the journal editor decide whether a paper is suitable for publication; and second, the journal readers themselves, who may be more or less knowledgeable about the topic addressed in the paper.Constructing a suitable scheme of headings and applying it consistently makes it easier for readers to get a bird’s-eye view of your paper while skimming through it.(Remember that few papers are read from beginning to end.Do not include context for the sake of including context: Rather, provide only what will help readers better understand the need and, especially, its importance.Consider anchoring the context in time, using phrases such as recently, in the past 10 years, or since the early 1990s.