Float is a time (Float time) is also referred as slack time that indicates particular tasks that can be delayed without delaying the project deadlines. In float time, scheduling of task becomes more flexible which can be used to offset many risks, if planned properly. Float time is typically presented with no. of days, weeks or month that gives project lead a flexibility on how long a task can wait before proceeding with the subsequent task. In order to make most out of float time, it is crucial for project lead to identify and strategically plan the activities.
Identification of float time improves the productivity of projects as every Project is unique and may involve many complex sequences of tasks, some of these tasks are critical tasks, which means that project lead has to make sure that these tasks are completed in defined timeline.
However, some of the tasks are non-critical tasks which can be done in less time & these tasks do not have any impact on subsequent tasks, the difference in Critical task time and non-critical task time is referred as float time.
Below is simple Example of float in CPM: -
Activity
Activity Time
Intermediate Predecessor
Start
0
-
A
4
Start
B
6
A
C
6
A
D
5
B
E
7
C, D
End
0
E
With reference to above diagram and calculation, it’s important to Identify critical and non-critical activities. Critical activities must be completed within specified timelines to prevent project delays while non-critical activities have some flexibility and by distinguishing between these two, project lead can focus on utilizing float time for non-critical activities without compromising project deadlines.
Utilization of float time can be determined to understand the potential impact on the project, resources required for meeting timeline of other critical tasks, Engaging resources in Improvement project like process improvement, professional skill development or Innovation activities etc.