Construction of the new deli is a big effort and includes several plumbing tasks, so you have them start on activity 3.2 (Install Deli Plumbing). You believe they can work ahead of the general water and gas service update in Activity 1.4 (Install Updated Plumbing).
You put the crew to work on activity 1.2 (Updating Walls and Ceilings) in the annex, while you wait for your plumbing contractor. The crew reluctantly agrees but they work slowly, and this will take longer than estimated.
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Correct: Don’t start on tasks that may have predecessors until you understand all dependencies.
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Your subcontractor discovers the main water and gas service must be replaced before any other plumbing work is started. You add this to Activity 1.4 (Update and Install Plumbing Service) and ensure that other plumbing tasks start after this is done. It is good that you did not waste time and money starting the Deli plumbing too soon. This is an example of understanding predecessor relationships and dependencies when sequencing your task schedule.
The extra plumbing work has created a three-week schedule delay. Jose asks if you can recover the time and offers to pay for more resources. You are ready to begin construction in the new annex, so you meet with your team to confirm that everyone agrees with the task sequence for this next phase. Here is a portion of the network diagram showing activities that could be done in parallel if resources are available.
Where do you assign more workers to speed up the project?
