Project schedule analysis involves assessing the flexibility inherent in each activity. Total float, also known as slack, represents the amount of time an activity can be delayed without delaying the project’s completion date. It is determined by subtracting the activity’s earliest finish time from its latest finish time, or alternatively, by subtracting its earliest start time from its latest start time. Free float, in contrast, defines the period an activity can be delayed without delaying the start of any successor activity. It is calculated by subtracting the activity’s earliest finish time from the earliest start time of its immediate successor.
Understanding and managing schedule flexibility is critical for project success. Identifying activities with significant flexibility allows project managers to prioritize resources, mitigate risks, and adapt to unforeseen circumstances. Historically, these calculations were performed manually, often using Gantt charts. Modern project management software automates these calculations, providing real-time visibility into the project’s schedule health. Recognizing and utilizing these values empowers informed decision-making throughout the project lifecycle.
