Too many numbers can be confusing to the reader so consider whether you really need to use them.
Multi-level numbering, with up to three levels, can be used in reports and formal policy documents. Numbered paragraphs allow each paragraph or point to be clearly identified and referred to. They are very useful in larger documents, especially if technical or legally binding. Committee reports should use this style (see Report writing guide for further information). Use the decimal numbering system (1, 1.1, 1.2, 2, 2.1, 2.2, etc), as it is clear, flexible and easy to follow. You will find an example of report numbering at Appendix B.
Avoid using Roman numerals (i, ii, iii, iv, v, etc) as these are less easy to follow.