An organization has started a project to upgrade all computers in an organization. During the implementation phase of the project, the computer vendor notifies the project manager that the computer sy

Crashing involves adding resources to shorten the project duration, which is not suitable when resources are unavailable and would likely incur additional costs without addressing the root cause.

Optimizing is a general term for making the best use of resources, but 'delaying' is a specific technique that falls under optimization for this scenario, making it a less precise answer than C.

Delaying is the most appropriate technique when a temporary resource unavailability, like a backorder, occurs because it involves rescheduling affected activities to align with when resources will become available. This approach avoids additional costs associated with crashing or fast tracking, and optimizes the existing schedule within the new constraints.

Fast tracking involves performing activities in parallel that would normally be done in sequence, which can increase risk and is not helpful when a core resource is simply unavailable for a short period.