What is meant by negative float in project scheduling?

Negative float in project scheduling refers to the situation where the completion of a project or a particular task is projected to miss a specified deadline or constraint. Essentially, it indicates that the planned timeline for the project is insufficient to meet contractual obligations or necessary completion dates. This scenario often arises due to various factors, such as unforeseen delays, scope changes, or resource allocation issues.

In this context, negative float indicates that the project is behind schedule to the extent that it cannot be completed by the deadline dictated by stakeholders or contractual requirements. Project managers must address this situation by finding ways to eliminate or reduce negative float, through methods such as accelerating tasks, adjusting resources, or re-evaluating project timelines.

The other options describe different aspects of project planning and management but do not accurately depict the essence of negative float in relation to missing a constraint.