Nodes at this point can also be represented as followgefinitions: "ES = Earliest time the activity can start Activity Early Activity EF = Earliest time the activity NAME Early Name Start Finish can finish (ES) (EF) LS = Latest time the activity Duration Late Late can start without delaying Start Finish the entire project (+) (LS) Duration (LF ) LF = Latest time the activity Slock For ADD, MAX Step 2: Find ES and EF for each node (called "Forward Pass") To start forward pass, beginning node has ES=0 ES Activity EF =Predecessor EF (MAX if >1) = Es + time Step 3: Find LS and LF for each node (called "Backward Pass" LF To start backward pass, last node EF=LF = LF - time = Successor LS Time (MIN if > 1) SUBTRACT, MIN Pass Step 4: Find Slack = LS-ES (or LF-EF) Not needed for start/end nodes Step 5: Draw the Gantt chart: Activity Time Period 0 1 2 3 4 5 6 Design Build Test