There are several techniques that can be used when planning a project.

A technique which can be used with critical path analysis to deal with uncertainties and risk within the project.

A set of documents identifying each stage and task to be performed during development, defining a hierarchy of work prior to the allocation of tasks.

A method of scheduling tasks using a chart on which bars represents the relative length of the task.

A technique to arrange activities required to achieve the project objective, agreeing the objectives and determining exactly  the project aims.