Described herein is a computer implemented method. The method comprises receiving, from a server application, project data defining a plurality of tasks and a plurality of iterations, each iteration having a start time and an end time and displaying, on a display, a timeline graphical user interface including a plurality of task timelines, each task timeline corresponding to one of the plurality of tasks. The method further comprises detecting a first user input, the first user input associated with a particular task and, in response to detecting the first user input, displaying a plurality of available drop zones in the particular task's timeline, each available drop zone corresponding to an available iteration, an available iteration being an iteration that the particular task can be assigned to.