In project management, there are four types of dependencies: 1  Finish to Start (FS) - Later task does not start until the previous task is finished. 2  Finish to Finish (FF) - Later task does not finish until the previous task is finished. 3  Start to Start (SS) - Later task does not start until the previous task starts.
http://www.tutorialspoint.com/management_concepts/leads_lags_floats.htm
Add lead or lag time. 1  Double-click a task name, and then click the Predecessors tab in the Task Information box. ©. 2  In the Lag column, type the lead time or lag time you want. To add lead time, type a negative number or a negative percentage (for example, -50%). Lead time is an overlap between two tasks, where those two tasks share a dependency (a relationship between tasks).
https://support.office.com/en-us/article/Add-lead-or-lag-time-to-a-task-692FDE75-0734-47B6-A259-E87AA1A538F4
Lead versus Lag (CONCEPT 15) Each post within this series will present a comparison of common concepts that appear on the PMP and Certified Associate in Project Management (CAPM)® exams. Lead versus Lag. Lead and lag are two terms associated with the relationships that may occur between multiple schedule activities.
https://www.passionatepm.com/blog/lead-versus-lag-pmp-concept-15
How to Avoid Using Schedule Leads. You are here: / / How to Avoid Using Schedule Leads. January 21, 2014 By TheP6Pro. “I feel the need; the need for Leads!”. Leads (Negative Lags) are generally regarded as a bad thing when it comes to “Best practice” scheduling. So if you feel the need for leads, get over it.
https://tensix.com/2014/01/how-to-avoid-using-schedule-leads/
A step-by-step article for using lag and lead time in a Microsoft Project 2007 file. 1  slide 1 of 4. In addition to using task relationships to define your project schedule, you can modify when a relationship goes into effect using Lag and Lead options. 2  slide 2 of 4. Lag Time. 3  slide 3 of  4.
http://www.brighthubpm.com/software-reviews-tips/4834-project-2007-using-lag-and-lead-time-part-one/
A step-by-step article for using lag and lead time in a Microsoft Project 2007 file. slide 1 of 4. In addition to using task relationships to define your project schedule, you can modify when a relationship goes into effect using Lag and Lead options. As you create relationships, you will see the Lag box in both the Task Dependency dialog box and the Task Information dialog box. Lag and lead time are both entered in the Lag box. slide 2 of 4.
http://www.brighthubpm.com/software-reviews-tips/4834-project-2007-using-lag-and-lead-time-part-one/
Lead time and lag time can be entered either as a duration (for example, two days after the completion of the task) or as a percentage of the duration of the predecessor task (for example, begin the task when the predecessor's duration is 50% complete). 1  On the View menu, click Gantt Chart.
https://support.office.com/en-us/article/Add-lead-or-lag-time-to-a-task-692FDE75-0734-47B6-A259-E87AA1A538F4
Lead and lag are both used in the development of the project schedule. Lead is an acceleration of the successor activity and can be used only on finish-to-start activity relationships. Lag is a delay in the successor activity and can be found on all activity relationship types.
https://www.passionatepm.com/blog/lead-versus-lag-pmp-concept-15
The float time for an activity is the time between the earliest (ES) and the latest (LS) start time or between the earliest (EF) and latest (LF) finish times. During the float time, an activity can be delayed without delaying the project finish date. In an illustration, this is how it looks:
http://www.tutorialspoint.com/management_concepts/leads_lags_floats.htm
This article discusses the situation where a “Lead” would appear to be the answer, and explore alternatives to using them to stay within generally accepted scheduling guidelines. The need to use a Lead is typically felt when something has to happen at some given time prior to the completion of an activity. However, it’s another one of those best practice conundrums: I shouldn’t use Leads: long Lags are also not good, and a constraint is also discouraged.
https://tensix.com/2014/01/how-to-avoid-using-schedule-leads/
should you use lead or lag time in project schedules
Yes, lead and lag are both used in the development of the project schedule. Lead and lag are both used in the development of the project schedule.