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Unformatted text preview: s eager to schedule the tasks. Here is what happens. When you enter information about an individual task into Project, it wants to schedule that task as soon as it is entered. Consequently, if you leave the task's Duration column blank, Project automatically enters a duration of one day. This allows Project to go ahead and schedule the task— perhaps with the Figure 7-6. Task sequencing for example project. wrong duration, but it gets the task scheduled. This may produce a meaningless Gantt chart, but the PERT Chart View will be the same as what you would expect to get if you did not enter durations. It is possible to zero out these one- day durations that Project automatically inserts when you leave the duration column blank. You might think that this would be the thing to do to cause Project to produce a pure task sequencing. This can be done, but it will not change the way the PERT Chart View will look. It will, however, cause the Gantt Chart View to look very strange because of the way Project deals with tasks of zero duration. For this reason, it is best to just leave the duration column for each of the tasks blank and let Project put in the one -day durations when you are doing task sequencing. This is essen - Page 179 tially how you get around entering the duration information at this time. 7.2— Resource Scheduling At the time the tasks are sequenced, as discussed in Chapter 2, the tasks should not yet have been estimated. The reason for this is that the sequencing of the work should be taken into consideration when estimating the task budgets (e.g., man-hours, dollars). And an attempt to schedule the tasks should not be undertaken until the estimates have been made so that the resources needed to complete the tasks can be taken into consideration in the schedule. It is common for projects to schedule tasks without knowing the resources needed to accomplish each task, but it is not a good idea. Project allows this, and it is common for projects using Microsoft Project to schedule projects this way. We discuss this method of scheduling a project first. Project also provides the capability to do resource scheduling, and we discuss that next. The difference between simple scheduling (without knowledge of the resources) and resource scheduling is that with simple scheduling, you attempt to guess the duration of each task, whereas with resource scheduling, the scheduling system computes the duration based on the resources required. 7.2.1— Simple Scheduling There was a time when simple scheduling was the only kind there was. In the early 1960s, draftsmen were employed to draw PERT schedule diagrams manually. They would manually move the boxes around on a large drawing, trying to construct an optimum schedule by trial and error. By the mid1960s, draftsmen still drew schedules, but computer programs were beginning to appear that would calculate the optimum dates. The draftsman was now faced only with placing the boxes on Page 180 the drawing in such a way as to minimize the number of arrows that crossed eac...
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This note was uploaded on 01/11/2011 for the course ACC 9 taught by Professor Yeetan during the Spring '10 term at Sunway University College.
- Spring '10