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Project Planning and Scheduling Class – Let’s Walk Through the Network Diagramming and Scheduling Exercise

May 29, 2011

Hello.  Wanted to make sure that we got all of the nuggets of information from the Network Diagramming and Scheduling exercise in class so I thought I would walk through it again here in the blog.

You will want to have the Team Activity Case: Old College Place Land Reclamation Project handy for easy reference.  In the previous class (session 3) we created a WBS and WBS Dictionary and Responsibility Assignment Matrix.  (If you were absent that day, I highly recommend that you go back and do that exercise.  You can refer to the sample answers in the case study p. 11-13)

From the WBS, we can create an activity list using the WBS numbers.  We will use these WBS numbers to identify the activities and tasks on the network diagram.  We will adhere to the standard of moving from left to right with the arrows pointing from the predecessor task to the successor task.

We create a starting point and from the case we can see there are 2 initial milestones (see charter).  Milestone 1 is the design is approved and equipment is selected (5/24/2010) and Milestone 2 is that site prep is complete (by insurance company) (5/21/2010).  Milestone 1 is the predecessor for Tasks 1.1.1 – Purchases by Landscape Designer (5 day) and 1.1.2 Equipment Purchases (Non-Play Equipment)(10 day).  Milestone 2 and Task 1.1.1 are the predecessors for Task 1.2.1.  Although Task 1.1.1 is only 5 days, Milestone 2 does not finish until May 21st which means that Task 1.2.1 cannot start until May 21st.  We will not deal with in the network diagram, rather when we load the tasks into the calendar.

The predecessor for Tasks 1.2.2, 1.2.3 and 1.2.4 is Milestone 4 so we will move past them for now and map them to Milestone 4 when we get there.  Tasks 1.2.1, 1.2.2, 1.2.3 and 1.2.4 are the predecessors for Milestone 3, so we will keep moving down through the activity list and return to them after Milestone 4 is completed.

Tasks 1.2.1 – Landscape installation – walkways (3 days) and 1.1.2 – Landscape installation – play area mulch (3 days) (with a FS +15 days) are the predecessors for Task 1.3 – Lighting Installation (2 days), so although Task 1.2.1 completes on day 8, Task 1.1.2 takes 10 days and Task 1.3 cannot start until 15 days after task 1.1.2 completes, so Task 1.3 cannot start until day 25.

The predecessor for Task 1.4.1 – Equipment installation – play (1 day) is Task 1.1.1 (with a FS +11 days) and Task 1.2.1.

Tasks 1.2.1 and 1.1.2  are both predecessors for Task 1.4.2 – Equipment installation – seating & trash cans (1 day) and Task 1.4.3 Equipment installation – canopy (1 day).  Once we have completed Tasks 1.4.1, 1.4.2 and 1.4.3, we have completed Milestone 4 – Equipment installation – complete.

I will continue to work on this.  Wanted to get this much posted to encourage you to use this post to ask questions, make observations and discuss the exercise.  Check back for updates.


We pick up the exercise following the completion of Milestone 4.  Now that Milestone 4 is complete, Task 1.2.2 Landscape installation – play area mulch (3 days), 1.2.3 Plant installation (3 days) and 1.2.4 Groundcover Installation (5 days) can be completed.  With the completion of  Tasks 1.2.1, 1.2.2, 1.2.3 and 1.2.4, Milestone 3 – Landscape Installation Complete is now achieved.

Now that Milestone 3 and Task 1.3 are complete, we can start Task 1.5 – Final approval preparation (3 days).  Task 1.5 is the predecessor for Task 1.6 – Final Approval (1 day), which is the predecessor for Task 1.7 – Close out work (2 days).  With Task 1.7 complete, Milestone 5 – Project Complete is accomplished and the project is finished.

Next up – resource load the project

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