1. How does having a scope and WBS help project teams during project execution? Why is it difficult to develop good plans? 2. Name the main planning tasks performed as part of project integration management? What are the main documents created, and what should they contain? 3. Identify the planning tasks performed as part of project time management. What is the critical path for a project? Why is it important to know which tasks are on the critical path? How would you gain support from the project sponsor on the tasks on the critical path? 4. During project cost management, what are the main planning tasks performed? Identify the difference between a cost estimate and a cost performance baseline. Why is it important to have clear ground rules and assumptions for a cost estimate? Solution 1. How does having a scope and WBS help project teams during project execution? Why is it difficult to develop good plans? The main purpose of project planning is to guide project execution. To guide execution, plans must be realistic and useful, so a fair amount of effort must go into the project planning process (Schwalbe, 2013). Planning is often the most difficult and unappreciated process in project management because people often do not want to take the time to plan well, but theory and practice show that good planning is crucial to good execution (Schwalbe, 2013). 2. Name the main planning tasks performed as part of project integration management? What are the main documents created, and what should they contain? Project integration management involves coordinating all the project management knowledge areas throughout a project .