AAOM Handbook

SC.02 Is Scheduled Date Still Okay? Context

Every work package has a distinct window that defines the right time for scheduling. This window is bounded by the earliest date that all requirements for completion of the work can be assembled (the Earliest Start Date), and by the latest date by which the work must be started (the Required Date less the work duration = Latest Start Date). Work Orders and Tasks created via the Work Scheduling System are automatically allocated a Scheduled Start date based on the trigger event and are also allocated an earliest and latest start date that is based on the specified trigger tolerance. However, when other Work Orders/Tasks are approved and first enter the scheduling process they will not have a Scheduled Start Date allocated. They will probably only have the basic requirements of an approved Work Order (including just a single Task) to define the work and provide guidance to set the Scheduled Start Date. An earliest and latest start date will not yet have been specified. As planning of the Tasks comprising a Work Order is completed, and the procurement of resources undertaken, the Earliest and Latest Start Dates for the Tasks will be defined or adjusted. As information on this scheduling window becomes available the Scheduled Start Date assigned to each Task must be checked to ensure that there are no critical issues that will prevent the Work Order being completed by its Required Date. This question asks whether the Scheduled Date for each Task is within the period bounded by the Earliest and Latest start Dates that have been established during planning. Purpose To determine if the Scheduled Date is within the scheduling window for a Task. Quantity One decision whether to;  leave the Scheduled Date for a Task unchanged,  adjust the Scheduled Date for a Task to fit within the Earliest and Latest Start Dates, or  identify a critical issue for completion of the Work Order by its Required Date. Quality A Scheduled Date cannot be set such that a Work Order will be completed after the Required Date without the express approval of the responsible manager.