AAOM Handbook

WE.28 Can Some Task(s) be Rescheduled & Still Meet Required Date? Context The primary objectives when executing a Task are to ensure that the work is completed when scheduled, that all required outcomes, specifications and tolerances are achieved in the allocated time, and that the sustainability expectations of the Company are mete. Throughout the execution of the schedule, and the Tasks in it, a check is maintained on both the rate of progress and on achievement of the specified outcomes. If it becomes apparent that the full committed schedule cannot be completed in the available time, and with the resources that can be mobilised, then some work from the schedule will have to be re-scheduled. In such cases an analysis of all of the work remaining on the schedule must be made to determine which work can be re-scheduled with the lowest potential impact on the business area. It is not uncommon that the first reaction to difficulty in executing a Task is to re-schedule the Task presenting the difficulty. This may be a good option but, where the potential impact of not completing the Task is high, it may be better to re-schedule other work in order to make time or resources available to complete the more critical Task. There are several types of variation that can be made to the schedule. A variation that results in no risk is to defer from the current schedule period a Task, and any Tasks that are dependent on its completion, that has been scheduled far enough ahead of its Required Date that it can be re-scheduled for completion before its Required Date. Purpose To decide if a Task in the current schedule period, that can be deferred and still be completed prior to its Required Date, will be rescheduled. Quantity One decision to defer completion of a Task(s) from the current schedule period. Quality The decision criteria to be used are:  it is not possible to complete all of the Tasks assigned to the current schedule period, and  a Task assigned to this scheduled period can be rescheduled and still meet its Required Date, and  the cost of rescheduling the Task is less than the cost of rescheduling other Tasks.