Project Dependencies are what it literally means. There are 4 types of project dependencies – Mandatory dependency or Hard logic, Discretionary dependency or soft logic, External Dependency, Internal Dependency. This concept is not a difficult one, if not easy. Before going to the different types and attributes of dependencies, let’s first understand what a dependency is.
What is Project Dependency?
In simple terms, Dependency means “Logical relationship”. In the Project Management world, Dependency is a logical relationship between two activities, or between an activity and a milestone.
What is a Dependency Attribute?
In Project Management, a Dependency Attribute is the characteristic of a dependency.
There are 4 dependency attributes: 1) Mandatory 2) Discretionary 3) External 4) Internal.
Based on these 4 attributes, there are 4 types of dependencies
- Mandatory dependencies
- Discretionary dependencies
- External Dependencies
- Internal Dependencies
Further, Two attributes can be applicable at the same time resulting in 4 more dependencies
- Mandatory External Dependencies
- Mandatory Internal Dependencies
- Discretionary External Dependencies
- Discretionary Internal Dependencies
Now, let us see the different types of dependencies based on the types of dependencies.
4 Basic Types of Project Dependencies
Mandatory Dependencies or HARD LOGIC
- These are legally or contractually required or inherent in the nature of work.
- They often involve physical limitations (eg: In a construction project, you can’t erect the walls with out laying the foundation first.).
- They are referred to as Hard logic or Hard dependencies.
Discretionary Dependencies or SOFT LOGIC
- These dependencies are established based on the knowledge of best practices, even though there are many other possible sequences of doing things.
- They are referred to as Soft logic or Preferential logic or preferred logic.
- You can modify discretionary dependencies if necessary.
- These involve dependency or logical relation between the project and a party outside the project.
- These dependencies are usually outside the Project Team’s control.
- These involve a sequential relationship between different activities of a single project.
- These dependencies are usually inside the project Team’s control.
Who identifies the dependencies?
Mandatory & Discretionary dependencies are identified by — Project Team
External & Internal dependencies are identified by — Project Management Team