Dependent Task is a task that belongs to a certain work entity (project or process) and relates to other tasks of the same work entity in a way that ensures their interconnection and common direction. Such a task can be a sub-task of a larger activity. It causes an effect to other tasks and sub-tasks.
Dependent tasks are planned and managed within a single project or process. They consume common resources to transform available inputs into desired outputs. For example, in a project dependent tasks consume money, time, labor and other project resources to transform materials and information into measurable and observable outcomes or project deliverables. Methods and tools used to plan and manage this project are also applied to planning and managing dependent tasks and activities.
Dependency is the key condition that makes a task dependent on other tasks. Task dependency is the relationships between tasks (and their sub-tasks) within a project or process to define the rules of change for the working environment and establish logical links between start and finish of tasks.