Homework Help - Early Start Activity

Management
Tutor: None Selected Time limit: 1 Day

how do you determine the ES, LS, EF, and LF for each activity?

Jul 6th, 2015

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Computing Earliest Times

Step 1. Mark “start” node: ES=EF=0.

Step 2. Repeatedly do this until finishing all nodes:

For a node whose immediate predecessors are all marked, mark it as below:

ES = Latest EF of its immediate predecessors,

EF = ES + t

Note: EF=ES at the Finish node.

Computing Latest Times:

Step 1. Mark “Finish” node:

LF = LS = EF of “Finish” node.

Step 2. Repeatedly do this until finishing all nodes:

For a node whose immediate children’s are all marked with LF and LS, mark it as below:

LF = Earliest LS of its immediate children,

LS = LF – t

Note: LS=LF at Start node.


Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 6th, 2015

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