First, the construction period is ahead of schedule.

Second, due to some reasons, the effective construction period is reduced.

Preventive and control measures:

1. Make clear the specific reasons for the work stoppage, draw a clear line between the responsibilities of both parties, and the owner, supervisor and contractor put forward feasible schemes such as increasing manpower, equipment and scientific and technological investment according to the existing personnel and equipment of the construction unit combined with the engineering quantity.

2, due to the reasons caused by the construction unit, it should be clear that the construction unit to increase capital investment, compensation for losses;

3, due to the reasons caused by the construction unit, it should be clear that the loss shall be borne by the construction unit, and the construction unit can take measures such as increasing investment by the construction unit or instructing subcontracting to ensure the construction period, fundamentally ensure the project quality and reduce quality hazards.