It is provided a computer-implemented method for managing a task having a start datum and an end datum. The method comprises the step of providing specifications of the task, the specifications including a start range indicative of possible values for the start datum, an end range indicative of possible values for the end datum, and a schedule of the task, the schedule of the task including a scheduled start value for the start datum that belongs to the start range and a scheduled end value for the end datum that belongs to the end range. The method also comprises the step of displaying, on a timeline, bar charts representative of specifications of the task, including at least a bar chart representative of the schedule of the task. Such a method improves the management of a task.