Estimation and developing WBS (Estimation Method) 2121 unread replies.2121 replies. Read the following: PMBOK7 (Guide) - Section 2.4.2.2 Estimation and Section 4.4.2 Estimating PMBOK7 (Guide) - Section 2.4.2 External Environment, Section 2.6.2.2 Scope Definition and Section 2.6.2.3 Moving Targets of Completion Why is a WBS RequiredLinks to an external site. Preparing a WBSLinks to an external site. Leveraging WBS During an Agile ProjectLinks to an external site. Estimating is an art - What it takes to make good artLinks to an external site. PMBOK7 (Guide) - Section 2.4.2.3 Schedules PMBOK7 (Guide) - Section 2.4.2.4 Budget Optional Reading CPM 4e - Section 7.4 Work breakdown Structure Prepare a 150- to 300-word response answering the following prompt: Describe the various estimation methods you considered and your rationale for the method you selected. Post your response to the appropriate discussion thread by Day 3 of Module 9. Respond to at least two of your classmates' posts in a substantive manner that moves the conversation forward by Day 7 of Module 9. If possible, please respond to a classmate who has not yet received a response