The outline format should follow a numerical order. At least two bullet points should be included at each level of the outline. If no subdivision is necessary (or possible), then no separate bullet point is required. Here is an example of a numerical outline format:
1. Introduction
2. The nature and significance of market research
3. Methods of market research

3.1 The research process

3.2 Determining the research design

3.3 Developing of measuring instruments

The numerical order makes it easy to interpret cross-references within the paper. For example, a reference to bullet point 2.1.3 means that the text passage identified in this way can be found in the third section of the first chapter of the second part. The numerical order theoretically allows for an unlimited number of subdivisions. However, for a seminar paper or thesis, a depth of three levels (e.g. 2.3.1) should not be exceeded. A subchapter should usually be at least one page long.