Efficacy means the ability to produce the desired output.
It is definitely important to get feedback from employees and customers.
The raw material cost should be reduced subject to not reducing the quality of the raw material. If the raw material quality is affected then it would affect the sales.
To maximize the shareholder profit the sales should be increased and the cost should be reduced. And strategies should be taken to increase sales.
Achieving the goals and objectives would in turn increase the shareholder's return.
To achieve the goals and objectives strategic planning should be undertaken by the company.