Explanation
A 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. A dependent task can be a sub-task of a larger activity. It causes an effect to other tasks and sub-tasks. A dependent task cannot start until other tasks are completed, because it relies on the output, input, or resource of those tasks. A dependent task is also referred to as a logical relationship, because it shows the logical order or sequence of the tasks1. An analysis task is a task that involves examining, evaluating, or interpreting data, information, or requirements. An analysis task can be a dependent task or an independent task, depending on whether it requires the completion of other tasks or not. An analysis task can also be a predecessor task or a successor task, depending on whether it precedes or follows other tasks. An analysis task is a common type of task in business analysis2. A predecessor task is a task that comes before another task in a sequence or a network of tasks. A predecessor task can be a dependent task or an independent task, depending on whether it affects or is affected by other tasks or not. A predecessor task can also be an analysis task or a different type of task, depending on its nature and purpose. A predecessor task can start before other tasks are completed, as long as it does not depend on them3. An independent task is a task that does not belong to a certain work entity (project or process) or does not relate to other tasks of the same work entity. An independent task can be a standalone activity or a part of a larger activity. It does not cause an effect to other tasks or sub-tasks. An independent task can start at any time, regardless of the completion of other tasks, because it does not rely on the output, input, or resource of those tasks. An independent task is also referred to as a discrete task, because it is separate and distinct from other tasks1. References:
CBAP Handbook
Predecessor Task - iiba.org
Dependent Task - iiba.org