Why is it important for assumptions to be listed in the cost estimate? What are

Why is it important for assumptions to be listed in the cost estimate?
What are the similarities and differences between critical path and critical chain project management?
You are working on a project to install and start-up a new assembly production line. Describe some normal causes and special causes of variation that might be encountered. How would these impact the project budget? How would you try to mitigate these variations in your project planning?
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