Differences in opinion occur between employers and contractors on many issues. However, both will agree that completing the project as quickly as possible is a common goal, albeit for different reasons. The employer generally wants to have a project completed quickly so that the facility can be put to use as soon as possible. There are circumstances in which an employer may not want to have a project completed earlier than planned for financial or other business reasons; in such a case the employer simply wants the project delivered on time. The contractor, on the other hand, wants to complete the project as quickly as is economical because every day spent on site costs money. Furthermore, cash flow is the lifeblood of the contractor; without it he will not survive. Achieving the scheduled monthly progress helps the contractor to meet his cash flow requirements.