What I learn from reading “Critical Chain”

This book is about project management. Specifically, the book emphasizes the concepts of critical path vs critical chain. In a nutshell, a critical path accounts for all the tasks that must be done sequentially in order to complete a project. To estimate project completion using the critical path method, one needs to estimate all the times it takes for each step to complete and sum them up. For comparison, the critical chain accounts for the tasks as well as the resources to complete those tasks.