The dependency between software installation and desktop installation is a mandatory dependency. A mandatory dependency is a type of dependency that is inherent in the nature or logic of the work and cannot be avoided or changed. It is also known as a hard dependency or a hard logic dependency. A mandatory dependency means that one task must be completed before another task can start or finish. For example, software installation can only start after desktop installation is finished5 The dependency between desktop installation and software installation represents a mandatory dependency. A mandatory dependency is a type of task dependency that is inherent in the nature of the work being performed. In this case, software installation cannot begin until desktops are installed and powered on, and therefore, the dependency is mandatory. Reference: CompTIA Project+ Study Guide, Chapter 3: Project Integration Management, Objective 3.1: Identify the project management processes and the interactions between them.