Critical Path Method Rules

Question 1

Forward Pass EF

Answer 1

Early Finish

Duration + ES - 1

Question 2

Forward Pass ES

Answer 2

Early Start of Successor task

latest EF of predecessor + 1

Question 3

Backward Pass LS

Answer 3

Late Start

LF - duration + 1

Question 4

Backward Pass LF

Answer 4

Late Finish of Predecessor

earliest LS of Successor tasks - 1

Question 5

Float

Answer 5

Slack
LF - EF or LS - ES
How many days a task can be delayed before project impact

Question 6

Critical Path

Answer 6

Sum of longest duration path

Any delays will delay project