A timeline is a chronological order of events. In most cases, it is a line with dates, events, or actions. A project manager or business analyst needs to develop skills to build an accurate timeline. It should be noted here that a project schedule is typically built by the project management team at the workplace. It reflects all the steps and procedures to complete the task on time and with available resources. The first thing that one needs to do while creating a product is to think about what kind of product you are planning on making. As the below year-long diagram suggests, a project timeline typically takes the form of a horizontal bar chart, where each task is given a name and a corresponding start and end date.