| Article ID: | iaor20042818 |
| Country: | United Kingdom |
| Volume: | 54 |
| Issue: | 12 |
| Start Page Number: | 1296 |
| End Page Number: | 1299 |
| Publication Date: | Dec 2003 |
| Journal: | Journal of the Operational Research Society |
| Authors: | Zhao T., Tseng C.-L. |
| Keywords: | project management |
In project scheduling, the free float (slack) of an activity represents the leeway for scheduling the activity without affecting any subsequent activity. In the context of activity-on-arrow (AOA) network representation, textbooks on project management, based on our survey, have for decades been using a popular formula to calculate free floats that may lead to erroneous results in the presence of dummy areas. In this note, we present a correct version of the formula. Extensions of the proposed formula to other floats such as safety float and interference float are also discussed.