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Answer is Line Manager.
Organization objectives and goals are depends on departments as per the mentioned goal like reducing staff is related to HR Dept., reducing cost would be Operations Dept., and so on.
So he should be Dept.,/ Line Manager.
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ofcourse the line manager.
Line managers are authorized to give orders and are in charge of accomplishing the organization's basic goals.
2- Line manager
Staff, Line & HR Managers are all Middle management who alongwith other team members work towards achieving the organisational goals.
It is only the Top management who is incharge of the organisation for setting goals, planning strategies, operations and to accomplish the goals.
YES, ITS LINE MANAGER
HR Manager
Line manager or you can say yours immediate boss should be responsible to achieve goals.
Line managers are in charge of accomplishing the organization's goals.
Line Manager is responsible to compete the organization's goal.