Another example to demonstrate that Day 4 is the EST ofActivity B can be achieved by applying a simple schedule change.Suppose the start time of Activity A in Fig. 29 is delayed by 2 days, which are equal to the TF. Thus, the start and the finish ofActivity A should be LST and LFT, respectively, of the initialschedule shown in Fig. 29~c!. There should be no time extensionof the project completion of Day 9 after rescheduling with thischange. However, as shown in Fig. 30, in which a dummy activityN having a FS:0 relationship to Activity A is added to delay thestart time of Activity A, the project completion has been extendedto Day 11. The EFT of Activity B after rescheduling should stillbe Day 9 as in Fig. 29~d!, provided that this late time calculationis correct.The same situations happen in all other relationship types. Theprocess to handle this special case for all relationship types is asfollows: when any negative lag time counting ends at the beginningof the next day of a nonworking day on the predecessor’scalendar, the counting continues to the beginning of the earliestnonworking day passing through all continuous nonworking days. Examples for all four relationships are compared with P3 resultsas shown in Figs. 31–34. P3 generates a different ~delayed!schedule for each case.