Answer:

A wise ruler should gather opinions from all sides', this is an epigram from ancient Egypt. For most people, especially the good leader, harmful to be a maverick in decision making process, on the contrary, it is essential for him to consult others before he make any important decisions and take his members' felling into account for their function in the whole project.
First of all, an effective leader should attempt to make his members or employees that they are part of the decision making process, otherwise, the company usually will get a severe consequence. For example, when running the government, officials need to consider experts and the masses’ thinking before they make any crucial decision. In the
80th of the last century, some local governments in east of china made a big decision to built up many chemical
factories to facilitate the development of local economy, without hearing the opinions of environmental experts and local people who had opposite views, after several years, many serious environment pollutions appeared such as air pollution, water pollution and wastes and gas discharged from those plants caused thousands of fishes died, badly hurt patients by chemical disease and even the sky became more and more darkness, which had an severe influence jeopardizing our society and living condition.
Moreover, a good leader keeping their worker or cooperation opinions in mind and make them feel themselves as an important factor to decision making process can raise working efficiency and lead a project or a plan to succeed more easily. For instance, on a TV program, I saw a competition between two teams in constructing building models which impressed me a lot. They are required to finish the work in an hour and which team the less time cost been the winner , first group was creating models independently by each members and another group work together and the leader listened to everyone' opinions during making decision process and they find the best way to achieve the goal which cost minimum time. At last, the second group won the championship easily.
Finally, an effective leader with consideration and foresight not only can make his company more competitive power, but also it can receive his employees' respectability and affection. David Chen was the CEO of a computer sales company in Shanghai, and he treated his workers as his family members. When he wanted to make important decisions, he preferred to receive all the workers' views and take every possible the decision may bring out into account for all his employees which made him succeed in computer sales regions and his workers once claimed that 'they were very lucky to work here and this is a matter of pride for himself because their boss's consideration and reputation'in an TV interview.
According to the argument discussed above, we can get a conclusion that an effective leader should try to make others feel that they are part of the decision making process.