Never underestimate the importance and the impact hiring a manager will have on your company. Whether it is a small business or a large corporation, hiring a manager should be considered a strategic action that has long term implications.
A manager, by definition, has a significant role whether it is to lead people or processes. Managers set the tone and atmosphere, and can be the key interface between corporate direction and production. It is imperative that filling any managerial position be taken as a very serious task.
The first decision to be made is where to most strategically locate the vacancy, based on future requirements, not simply to fill the position that is actually vacant.

The second task is to create a new job description. Even if the intent is simply to continue an existing position, the company should take the opportunity to make sure the description is current.

Third, a detailed profile of the ideal candidate should be constructed. While the ideal candidate may not be found, creating the ideal profile helps keep the interviewers focused on the job requirements first, and it helps measure the candidates against that first, rather than allowing the contest to be driven by personality.

Fourth, advertising the position needs to be considered carefully. Whether a manager is to be hired externally or promoted internally, advertising should be focused on the ideal candidate and also to discourage the average job applicant from responding.

Fifth, vacancy notices should be places where they can be most effective. Local newspapers may work for some positions, but if the intent is to bring in fresh thinking, trade or professional publications can help sift through the process.
Good candidates expect to answer a whole range of education and experience questions, and they expect to discuss examples of past approaches to situations. They expect much of the questioning to be around what they would do in a given situation in the vacant position. All pretty straight forward stuff.
In the final analysis the team must consider how the candidates fit against the mission and vision of the company. Would they be productive in an overall sense, or would they be so driven as to disrupt the flow of business.