The structure should follow a numerical order. On each level of the outline, there should be at least two subpoints. Where no subdivision is necessary (or possible), no separate outline point is required. Here is an example of a numerical outline scheme:

1. Introduction

2. Nature and significance of market research

3. Methods of market research
   3.1 The research process
   3.2 Defining the research design
   3.3 Development of measurement instruments

With numerical ordering, cross-references within the thesis can be easily interpreted. For instance, a reference to section 2.1.3 means that the cited passage can be found in the third subsection of the first chapter of the second part. The numerical structure theoretically allows unlimited subdivision. However, for a seminar or final thesis, it makes sense not to go beyond three levels of depth (for example, 2.3.1). As a rule of thumb, a subchapter should be at least one page long.