What an introduction contains
An introduction is usually 2–3 pages (3–5 for a thesis) and includes: relevance of the topic, aim, objectives, the object and subject of the study, methods, and the paper's structure.
Relevance
In 1–2 paragraphs explain why the topic matters now: an existing problem, a new law or decree, a change in statistics. Avoid generalities; give concrete facts and figures.
Aim and objectives
There is one aim — the main result of the work ("to identify ways to improve the efficiency of ..."). Objectives are the steps toward it: usually 3–5, each starting with a verb (study, analyse, propose). Every objective needs an answer in the conclusion.
Object, subject and methods
The object is what you study (say, a company or a process); the subject is the aspect of it you examine (say, its financial indicators). Methods: analysis, comparison, statistical methods, surveys, etc.
Structure of the paper
At the end, briefly state how many chapters and sections the paper has and how many sources were used. It's easier to write the introduction after the paper is done — then the aim and results line up.
Need a ready introduction?
OsonTopshir shows the cover page, table of contents and introduction of a course paper or thesis for free before you pay — you see how it will look for your own topic.