How to Make a Multi-Tier Timeline | Pen and the Pad Apr 17, 2017Since this is a multi-tier timeline you are showing the progress of several different subjects/categories and such over the same period of time. You might be comparing the lives of six different siblings or six different countries. Timeline for multi-tiered project by month Timeline for multi-tiered project by month. Use this timeline template to set milestones and phases for your project. The project can be up to 12 months in duration.