Читать книгу Construction Management JumpStart - Barbara J. Jackson - Страница 80

This level of influence includes subcontractors, material suppliers, and equipment vendors. This layer directly influences the outcome of a job in a serious way. Although this group is often directly connected to the primary players via a subcontract agreement or a purchase order agreement, they are primarily independent operators and not under the immediate control of the owner, the architect, or the contractor. And because they are not under direct control and yet provide vital services, they always add risks to the project. For example, a subcontractor is scheduled to start their portion of the work on a certain date but instead shows up three weeks later, delaying the startup of other related work and, therefore, delaying the completion of the overall project. Or a material supplier promises to deliver the concrete block for a commercial building on a Monday, and your masonry subcontractor has a full crew waiting to start the work at 7 a.m. The delivery doesn't arrive, and the subcontractor goes off to start another job. The block delivery then shows up on Tuesday, but the subcontractor is unwilling to return to your job until he finishes the one that he has already started.