Managers cannot always make right decisions, but they can use their knowledge of appropriate decision-making processes to increase the rest.
Decision making has been an important procedure in management, whether in planning, organizing, leading or controlling, whereas, biases affect a manager's process of decision making usually.
A bias is essentially a preconception that prevents a manager for seeing the facts as they are, essentially rendering them unable to make a qualified or accurate judgement.
This usually results in poor performance, frustration among the team, and failing to meet objectives.
Biases in management can be avoided through a rigorous selection process, adequate training and instruction, and a strong company policy or ethic.