Task modelling aims at building task models
of Human Computer Interaction.
Task modelling is a widely used tool in HCI. In the first place, it
enables developers to gather and organise end-users requirements, and then
to get a clear and general picture of the functionalities that are going
to be offered, as well as a clear representation on how these functionalities
are going to be organised, one in relation to the other.
Task modelling assists in the design, analysis, implementation and evaluation of applications by:
providing a common tool that can be used in development and understood by all members of a development team (software and usability engineers, graphic artists, industrial designers, managers, stakeholders, end-users, etc.),
defining a visual form allowing easy use during discussion and group work, and
developing an agreed common terminology between all parties making communication easier.
You can build a task model by hand, or using a task model editor, such as TAMOT. The TAMOT editor will allow you to create and manipulate the different elements that constitute the task model.