Figure 1 shows that tasks 27 to 31 are all linked, but the Start Date for each of the tasks is still 9/11 and the links all appear to have negative lags.

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Ms project start date not updating video

Have you ever been unable to change the start date of a task in Microsoft Project?

You type in 11/2 for the start date and it changes back to 11/19.

In most cases, Project is not misbehaving; you need to understand what Project assumes when it schedules tasks.

In this three-part series, we’ll explore how Project’s scheduling algorithms use links, constraints, preset options, and dates to automatically set your task start and finish dates.

Whenever you set a task schedule manually, you may or may not enter information about the dependencies, durations, date constraints, etc.

Anything that you enter will be interpreted as best it can, but the calculated schedule will be unreliable until you review the scheduling information and set the tasks to Auto Scheduling.

Deployment tasks, for example, may need to occur over weekends, as shown below: Figure 5 The task-specific calendar will always supersede the default project calendar when it comes to identifying working and non-working days for a task.

In Figure 6, notice that Task 22 is supposedly a 5-day task scheduled to start when Tasks 20 and 21 finish.

Note: A custom split view that shows both the Gantt Chart and the Resource Usage view is excellent for exposing these sorts of resource overloads.

To add the Resource Usage view to the Gantt Chart, go to and select “Resource Usage.” Figure 9 The Project Manager may then follow Microsoft Project’s advice and use the Resource Leveling feature, which postpones one of the tasks to avoid the resource overload.

, forcing calculations to be made manually, a number of features that we take for granted suddenly stop happening.