If you don’t want to level, you can try other ways to resolve overallocations.
– Replace one resource with another who is available to work at that time.
– Replace more skilled resources on critical tasks early in the project. A more skilled resource is likely to get the same job done in less time.
– Change a task link so that some tasks start at the same time.
– Spread the workload out by Increase the duration of tasks with overallocated resources.
– Reduce workload by reducing the amount of work required for completing the task.
– Change the working hours of resources to shorten the duration of tasks.
– Reduce the duration of tasks, especially critical tasks that directly impact the project end date.
– Check that resources are not working during non-working time. If a resource is working during non-working hours, Project will show them as overallocated.