Dependencies

Definition:
Relationships between tasks that determine the order in which they must be completed.

Key Components:

• Finish-to-Start (FS): Task B cannot start until Task A finishes.
• Start-to-Start (SS): Task B cannot start until Task A starts.
• Finish-to-Finish (FF): Task B cannot finish until Task A finishes.
• Start-to-Finish (SF): Task B cannot finish until Task A starts.

Use Cases/Industries:

• Construction: Ensuring foundation work is completed before framing begins.
• Energy Sector: Sequencing power plant commissioning steps.
• Software Development: Managing task dependencies in agile workflows.

Advantages:

• Provides logical task sequencing.
• Prevents scheduling conflicts and bottlenecks.
• Ensures efficient workflow and resource utilization.

Challenges:

• Complex projects may have multiple overlapping dependencies.
• Delays in one task can cascade across multiple dependent activities.

Related Terms:
Critical Path, Float, Lead and Lag

Example:
A pipeline installation cannot begin until the trench excavation is completed (Finish-to-Start dependency).