Activity On Node / Activity Network

Question 1

What is Activity on Node ?

Answer 1

A type of network diagram used in project management

Shows tasks as boxes (nodes) connected by arrows.

Arrows show the order tasks must be done.

Helps plan sequence and project timeline.

Question 2

Critical Path

Answer 2

The longest path from start to finish, determining the shortest possible time the project can finish.

If any task on this path is delayed → whole project is delayed

Question 3

Components of Activity -On Node Diagram

Answer 3

→ Nodes - circles/ boxes

→ Arrows

→ Duration Estimates

→ Float / Slack

→ Early start Early finish

→ Late start Late finish

Question 4

Expert Judgement Method

Answer 4

Ask experts for their experience-based guesses

They estimate how long tasks will take.

👉 Think: “When in doubt, ask the expert out.”

Question 5

Parametric Method

Answer 5

Uses numbers + past data to estimate time.

Based on parameters (e.g., size, cost, quantity) that affect duration.

👉 Think: “Measure by the numbers.”