The PMBOK guide defines that the Project Cost Management includes the processes involved in planning, estimating, budgeting, financing, funding, managing, and controlling costs so that the project can be completed within the approved budget.

What are the most important four key items in a cost management plan?

I think that the following 4 items are important for the Project Cost Managment.

• Units of measure.
• Thresholds of Control
• Level of accuracy.
• Rules of performance measurement.

Can you explain these 4 items with an example and justify your answer? (Please include the References , I will learn it later)