tailieunhanh - Project Management for Construction Chapter 10

Chậm trễ trong việc hoàn thành toàn bộ dự án do lịch trình không tốt cũng có thể gây ra sự hủy hoại đối với những người chủ đang mong muốn bắt đầu sử dụng công trình xây dựng | 10. Fundamental Scheduling Procedures Relevance of Construction Schedules In addition to assigning dates to project activities project scheduling is intended to match the resources of equipment materials and labor with project work tasks over time. Good scheduling can eliminate problems due to production bottlenecks facilitate the timely procurement of necessary materials and otherwise insure the completion of a project as soon as possible. In contrast poor scheduling can result in considerable waste as laborers and equipment wait for the availability of needed resources or the completion of preceding tasks. Delays in the completion of an entire project due to poor scheduling can also create havoc for owners who are eager to start using the constructed facilities. Attitudes toward the formal scheduling of projects are often extreme. Many owners require detailed construction schedules to be submitted by contractors as a means of monitoring the work progress. The actual work performed is commonly compared to the schedule to determine if construction is proceeding satisfactorily. After the completion of construction similar comparisons between the planned schedule and the actual accomplishments may be performed to allocate the liability for project delays due to changes requested by the owner worker strikes or other unforeseen circumstances. In contrast to these instances of reliance upon formal schedules many field supervisors disdain and dislike formal scheduling procedures. In particular the critical path method of scheduling is commonly required by owners and has been taught in universities for over two decades but is often regarded in the field as irrelevant to actual operations and a time consuming distraction. The result is seat-of-the-pants scheduling that can be good or that can result in grossly inefficient schedules and poor productivity. Progressive construction firms use formal scheduling procedures whenever the complexity of work tasks is high and .