What is head event?

Head Event – The finishing (or terminal) point of an activity is called a head event because it is connected to the head of an activity.

What is head event in project management?

The head event slack of an activity in a network is the slack at the head (or terminal point) of an activity. In other words, head event slack of an activity in a network is the difference between the latest event time and earliest event time at its head (or terminal point or node).

What is dual role event?

Dual role events are those events that act as a tail event for one activity and head event for another. So, in CPM all the activities except initial and end events in the network are dual role events.

What is the difference between total float and head event slack?

It is the amount of time that the activity completion time can be delayed without affecting the earliest start time of the immediate successor activities in the network. It is the difference between total float and free float. It is thus equal to the head event slack.

How do you calculate head event slack and tail event slack?

Head Slack, i.e. Slack for head event = LET – EET = LST – EST = 40 -39 = 1. Tail Slack = 25 – 17 = 8.

Project Management - Slack of an event

What is tail and head event?

Tail Event – The starting point of an activity is called a tail event because it is connected to the tail of an activity. In a network, tail event is represented by symbol "i". Head Event – The finishing (or terminal) point of an activity is called a head event because it is connected to the head of an activity.

What is EFT and LFT?

The calculation of earliest start times (EST) and earliest finish time (EFT) is used to create the project schedule. The calculation of latest start times (LST) and latest finish times (LFT) is used for schedule management, delay resolution, and fast-track planning.

What is head and tail slack?

The head event slack of an activity in a network is the slack at the head. The tail event slack of an activity in a network is the slack at the tail. As discussed earlier, the non – critical activities have some slack or float.

What is event slack in CPM?

Event slack is defined as the difference between the latest event and earliest event times. Slack time is the amount of time a task can be delayed before the project finish date is delayed. Thus, the slack is the difference between event times denoting the range within which an event time can vary. Slack = T_L - T_E.

What is the difference between free slack and total slack?

- Free slack: The free slack of an activity is the time this activity can be delayed without impact on the following activity. - Total slack: The total slack of an activity is the time this activity can be delayed without impact on the finish date of the project.

What is a tail event?

Noun. tail event (plural tail events) (probability) an event associated with a given infinite sequence that is determined by any subsequence of the form (a "tail" of that sequence) a low-probability event quotations ▼ an event that initiates an activity.

What is successor event?

An event wherein one of the two parties involved take on the legal powers, assets, or obligations of the other party.

What is Merge event?

merge event is defined as the merging of two or more requirements into one requirement and is formally represented as: r i + r j +... + r m à r n . Figure 2 represents a simple example in which two requirements R1 and R2 are merged into R3. Prior to the merge, object O1 is dependent upon R1 and O2 upon R2. ...

What is EST EFT LST LFT?

The calculation of earliest start times (EST) and earliest finish time (EFT) is used to create the project schedule. The calculation of latest start times (LST) and latest finish times (LFT) is used for schedule management, delay resolution, and fast-track planning.

What is activities and event?

An event is a specific instant of time, which makes the start or end of an activity. Event consumes neither time nor resources. Activity. An activity is the actual performance of the task and requires time and resources for its completion. It is the work required to complete a specific task.

What is CPM explain with example?

The CPM would describe the sequence that takes the most time. For example, if you're building a house, you would have several task sequences as follows: Each task takes a different amount of time and resources. It takes more time to build walls and lay the roof than to install faucets and fixtures.

What is difference between float and slack?

Slack Versus Float

However, the main difference between float and slack is that slack is typically associated with inactivity, while float is associated with activity. Slack time allows an activity to start later than originally planned, while float time allows an activity to take longer than originally planned.

What is PM float?

Put simply, project management float is the amount of time a given task can be delayed without causing a delay in the entire project.

What is total float in CPM?

Total float is the difference between the finish date of the last activity on the critical path and the project completion date. Any delay in an activity on the critical path would reduce the amount of total float available on the project.

What is free float in CPM?

Free Float: The amount of time that a schedule activity can be delayed without delaying the early start date of any immediately following schedule activities.

What is dummy activity?

A Dummy activity is a type of operation in a project network which neither requires any time nor any resource. It is an imaginary activity shown in a project network to identify the dependence among operation.

What are the types of float?

What is latest completion time?

The latest finish time is the latest possible date and time by which a project segment can be completed without negatively impacting the completion date for an entire project.

What is the difference between PERT and CPM?

1. PERT is that technique of project management which is used to manage uncertain (i.e., time is not known) activities of any project. CPM is that technique of project management which is used to manage only certain (i.e., time is known) activities of any project.