Dependencies in project management are the relationships between tasks or activities that determine the order in which they need to be completed. In other words, dependencies indicate which tasks must be completed before others can start and how they affect one another’s completion. They are essential for ensuring that projects run smoothly and on time.

Understanding these dependencies is important for successful project management as it helps ensure that all tasks are completed in the correct order with minimal delays and disruptions. It also helps managers properly plan resources and make sure that everyone involved is aware of their obligations. Managing dependencies effectively allows organizations to make better use of their resources and increase efficiency while avoiding costly delays or mistakes due to miscommunication or insufficient planning.

There are two main types of dependencies:

1. Finish-to-Start: This type of task dependency occurs when one task needs to be completed before another can begin (e.g., painting a wall needs to be finished before tiling begins).
2. Start-to-Start: This type of task dependency occurs when two tasks need to start at roughly the same time (e.g., laying carpet and installing cabinets both need to start at the same time).