Yet the ease with which financial and operational successes can be measured tended to favour executives with responsibilities in those areas.
The Right Management research found an overwhelming expectation among CEOs that they would be picked from the ranks of finance and operations professionals.
Yet finance and operational capability were not what those surveyed thought was important in a CEO, where by far the most important competency, at 92 per cent, was judged to be "creating a strategic vision" - a trait that rated only 16.8 per cent for the Chief Financial Officer role and 24.;1 per cent for Chief Operations Officers.
Decision-making ability was the fourth-ranked most important trait for CEOs, behind "inspiring others and maintaining leadership responsibility" (61.2 per cent), and "developing an accurate and comprehensive overview of the business" (54.5 per cent).
"The results suggest that many organisations suffer from a critical but hidden weakness in terms of leadership 'bench strength'...the depth and quality of emerging or next-generation leaders that the firm has available in the talent pool.
"Considering that essentially all execution will demand accomplishing the corporate goals through others, it may be telling that less than half of all respondents cited 'selecting and developing successors and key reports' as a critical strength for any role."
"It's difficult to achieve but I think they should consider it," he said, with evidence showing more positive reporting among companies that nurtured future leaders within their organisations rather than hiring externally.
The issue is a particular challenge for boards, says Grage-Perry, particularly where choices of chief executive risked a loss of consistency in leadership style.
While an internal appointment could lack a fresh perspective, "the benefit of the internal appointment is that if you are paying attention properly to talent internally, you will now more about that person than you'll know about any external candidate."
Similarly problematic could be the expectation that a newly appointed chief executive, especially an external appointment, should swiftly make significant changes, "rather than thinking about we need to do to support this person" as they come into a new leadership role.