Final answer:
Float is calculated as the difference between the latest and early start times or the latest and early finish times of an activity. In this case, both calculations show the float is 2 weeks.
Step-by-step explanation:
The concept being asked in the question relates to project management specifically to the calculation of 'float' in a project schedule. Float, sometimes called 'slack', is the amount of time an activity in a project network can be delayed without causing a delay to the project completion date. To calculate the float, you can use the formula: Float = Latest Start (LS) - Early Start (ES) or Float = Latest Finish (LF) - Early Finish (EF).
Using the given data:
Early Start (ES) = 6 weeks
Early Finish (EF) = 11 weeks
Latest Start (LS) = 8 weeks
Latest Finish (LF) = 13 weeks
We can calculate the float in two ways, but the result will be the same:
Float = LS - ES = 8 weeks - 6 weeks = 2 weeks
or
Float = LF - EF = 13 weeks - 11 weeks = 2 weeks
Both methods show that the float for the activity is 2 weeks.