4 2 3 5 2 3 6 3,4 3 7 3,4,5 1 All times are interpreted as of a time “the end period”. Gantt Chart ES=Early Start All times are interpreted as EF=Early Finish end of a time ‘the period’ TOC=Time of Completion Critical Path Method. (CPM) ES=Early Start EF=Early Finish Slack=Total Slack=Total Float LS=Late Start A Critical Activity is an activity with zero slack. LF=Late Finish All critical activities define the Critical Path, CP Slack= LF–EF=LS–ES Program Evaluation and Review Technique (PERT) E[Duration]=(t1+4t2+t3)/6 t1=Optimistic Time V[Duration]=[(t3–t1)/6]2 t2=Most Likely Time P[TOC<T]=  TOC=Time of Completion t3=Pessimistic Time TOC~N( =E(TOC), 2=V(TOC) ) Critical Path Method (CPM) AOA (Activity On Arrow) A PA T 1 -- 5 1 3 6 2 -- 2 3 1 2 4 2 3 2 4 5 2 3 6 3,4 3 5 4 7 3,4,5 1 CPM Algorithm -----Steps-----
4 2 3 5 2 3 6 3,4 3 7 3,4,5 1 All times are interpreted as “the end of a time period”. Gantt Chart ES=Early Start EF=Early Finish TOC=Time of Completion All times are interpreted as ‘the end of a time period’ Critical Path Method. (CPM) ES=Early Start EF=Early Finish LS=Late Start LF=Late Finish Slack= LF–EF=LS–ES Slack=Total Slack=Total Float A Critical Activity is an activity with zero slack. All critical activities define the Critical Path, CP Program Evaluation and Review Technique (PERT) t1=Optimistic Time t2=Most Likely Time t3=Pessimistic Time E[Duration]=(t1+4t2+t3)/6 V[Duration]=[(t3–t1)/6]2 TOC=Time of Completion TOC~N( =E(TOC), 2=V(TOC) ) P[TOC<T]=  Critical Path Method (CPM) AOA (Activity On Arrow) A PA T 1 -- 5 1 3 6 2 -- 2 3 1 2 4 2 3 2 4 5 2 3 6 3,4 3 5 4 7 3,4,5 1 CPM Algorithm -----Steps-----