Final answer:
True, resource leveling cannot always resolve all resource over allocations as it may extend project timelines or increase costs, and sometimes resources are simply finite or unavailable.
Step-by-step explanation:
Resource leveling is a technique used in project management to address and resolve resource over allocation by adjusting project schedules. True, resource leveling cannot always resolve all resource over allocations. This is because balancing resources may lead to extending the project timeline, increasing costs, or even impacting project scope and quality.
At times, there are finite resources or expertise that cannot be leveled without adverse effects on the overall project. In cases where multiple projects compete for the same resources or the resources are simply unavailable, leveling might not be feasible. Hence, project managers must explore other strategies such as resource smoothing, prioritizing tasks, or outsourcing.
Moreover, the context of war mentioned in the provided reference materials implies the complex real-world scenarios where resource constraints and human capabilities are tested at an extreme level, albeit in a different subject matter than project management.