Latest Dates in Project Management – Definition and Meaning
Latest dates in project management are the latest possible times by which a project task may start (latest start date, LSD) or finish (latest finish date, LFD) without jeopardizing the planned overall project end date or a subsequent milestone. They are calculated using scheduling techniques (e.g., critical path method) by performing backward scheduling from the project end and are key to determining the time float of tasks and identifying critical tasks (with no float).
Example, best practice, and further information
If a non-critical task has a total float of 5 days, this means its latest start date is 5 days after its earliest start date without delaying the project end. Calculating and knowing the latest dates is a core component of time scheduling according to the PMBOK Guide (especially the critical path method). While they are less explicitly calculated in agile methods, awareness of time flexibility remains important. Monitoring task progress against latest allowable dates helps identify potential delays early and maintain the project schedule.