Answer:
Classical management viewpoint
management science perspective
Explanation:
As the name suggests the closed system refers to a system in which the company is operating at their own without any influence to be done from the outside world
The classical management theory refers to the theory that depends on the trust that the employees have two needs i.e. physical and economical. Neither they have social needs, nor job satisfaction, etc
Management science perspective refers to a solving a problem and take the decisions that are beneficial for an organization
Therefore these two should be considered as a closed system
