ISBN : 978-81-963532-2-3 (E-Book) However, carefulexperiments have shown that unrealistically aggressive schedules not only cause engineers tocompromiseonintangiblequalityaspects,butalsoareacauseforscheduledelays.Agoodwaytoachiev eaccuratelyinestimationofthetaskdurationswithoutcreatingundueschedulepressuresis havepeople set their own schedules. to Fig.36.2:Activitynetworkrepresentationofthe MISproblem CriticalPathMethod(CPM) From the activity network representation following analysis can be made. The minimum time(MT) to complete the project is the maximum of all paths from start to finish. The earliest start(ES)timeofataskisthemaximumofallpathsfromthestarttothetask.Thelateststarttimeis the difference between MT and the maximum of all paths from this task to the finish. The earliestfinish time (EF) of a task is the sum of the earliest start time of the task and the duration of thetask. The latest finish (LF) time of a task can be obtained by subtracting maximum of all pathsfrom this task to finish from MT. The slack time (ST) is LS – EF and equivalently can be writtenas LF – EF. The slack time (or float time) is the total time that a task may be delayed before itwill affect the end time of the project. The slack time indicates the “flexibility” in 179 Software Engineering Keerthana P, Manasa KN, Ganga D Bengal
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