Define the period of work, depending on the size and type of building. Construction according to the employer want to finish the work on time because there are penalties if not completed construction on schedule.
The period of work, depending on the size and type of building, according to the employment needs to be done in time for a penalty if the construction is completed before the deadline.
The fixed period work, depending on the size and type of building, structure, as the employer need to finish the work in time for a penalty if the construction finish it on time.