Task Interrelatedness is a particular manner of connectedness between tasks which are related or linked to each other under certain requirements. It is a measure that shows all possible effects that tasks produce when dealing with each other. Interrelatedness explains the unity of tasks and their belonging to a single entity (e.g. project, goal, job).
Interrelated tasks are always connected to each other. They depend upon each other and aim to accomplish a common goal. Interrelatedness explains how close and by what parameters tasks are linked to each other.
Task interrelatedness is used in managing various physical or mental efforts such as projects and goals. Researching interrelatedness between tasks helps understand how those tasks influence each other and how they are managed and operated in the same environment.
For example, a series of sequenced and prioritized tasks creates a project that reaches success when all the tasks are done. Project tasks are performed and managed in the same environment and under the same standards and rules. They are interrelated because they belong to the same project, influence each other and aim to accomplish common goals.