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Manage Resource Overlaps and Split Assignments in Microsoft Project

Maira Mehtab Sep 22, 2026 868 views

Question details

The user needs to allocate overlapping tasks to a single person and represent changing work allocations over time without creating duplicate resources in the system.

Product: Microsoft Project
Device & OS: not provided
Scenario: A team member works exclusively on a first task, transitions to splitting time between the first and a second overlapping task, and finally works exclusively on the second task.
Observed behavior: Microsoft Project marks the resource as overallocated when assigned to multiple overlapping tasks, and it does not automatically split the resource's time equally or shift dates automatically.

Before you start

Ensure that your project calendar is correctly set up with the standard working hours of your team members before making manual adjustments to individual task assignments.

Solution 1Recommended

Adjust Daily Work Using Task Usage or Resource Usage View

Manually allocate the specific hours spent on each task during the overlapping period to accurately reflect changing workloads and clear overallocation warnings.

By default, assigning a resource to multiple tasks running at the same time will trigger an overallocation warning. Because Microsoft Project does not automatically balance the hours 50/50, you must use the detailed usage views to tell the software exactly how much time the resource spends on each task per day.

Switch to Usage View

Navigate to the 'View' tab on the ribbon and select either 'Task Usage' or 'Resource Usage' from the Task Views or Resource Views group.

Adjust the Timescale

Right-click the timescale header on the right side of the view, select 'Timescale', and change the Bottom Tier units to 'Hours' for more precise daily planning.

Locate Overlapping Tasks

Find the specific tasks where the resource is assigned simultaneously and identify the days where the overlap occurs.

Manually Input Work Hours

Click into the grid cells for the overlapping days and manually type the number of hours the person will work on each task (e.g., enter 4 hours for Task 1 and 4 hours for Task 2 to create an even split).

Review Schedule Recalculation

Press 'Enter' to apply the changes. Microsoft Project will automatically recalculate the task duration and schedule based on your revised work allocations.

Overallocation Icon: The red overallocation indicator will disappear once the total assigned hours for the resource across all tasks on a given day no longer exceed their maximum available working capacity.

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Frequently Asked Questions

Why does Microsoft Project show my resource in red?

The red text or indicator means the resource is overallocated. This occurs when you assign a team member to multiple overlapping tasks and their required effort exceeds their standard working capacity for that specific period.

Can Microsoft Project automatically split a resource's time evenly between tasks?

No, Microsoft Project does not automatically divide a resource's time equally (such as a 50/50 split) across simultaneous tasks. You must manually adjust the assignment units or daily hours in the Task Usage or Resource Usage views.

How do I fix overallocated resources without creating duplicates?

Instead of creating a duplicate resource profile, you should adjust the individual's daily work allocations. Go to the Task Usage view, change the timescale to hours, and reduce their assigned hours on overlapping days so the daily total does not exceed their availability.

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