Top Management Team · TMT
Top Management Team
What is a top management team?
- Strategy is shaped by how the top team sees the business
- The main problems are business-unit partisanship and approvals without discussion
- Treat the management team like any other team, with norms and retrospectives
Seen through the lens of the top management team, executive appointments shift from a 'people problem' to a 'combination problem'. When a seat opens up, the question moves from 'is this person capable?' to 'does this person bring a perspective the team lacks today?' And when performance slips, before singling out an executive, you first look at who holds which information and whether it actually reaches the meeting table. The quality of strategy comes not from one CEO's judgment but from the structure in which that judgment gets tested.
When diagnosing a TMT, look at composition and process separately. Composition means job-related diversity: functional background, tenure, and the share of external hires. Process is checked through three behaviors: whether members actually exchange information, make decisions together, and help each other reach their goals. Diversity turns into performance only when process supports it. Team size matters too. Once a team goes beyond roughly 5–9 members including the CEO, it becomes hard for everyone to work through a single agenda item to the end, and splitting into standing subcommittees works better. It is easy to confuse a TMT with the board of directors, but unlike the board, which handles oversight and checks and balances, the management team is the group that is accountable for carrying decisions out, so the output of its meetings should be decisions, not opinions.
The most common misconception in practice is that filling the seats with diverse people is enough. If you bring in one executive from outside and leave the way information flows unchanged, about six months later that person goes quiet or leaves, saying, “I’m the only one here saying something different.” Failing to distinguish task conflict from relationship conflict is the same kind of trap. If you call for a fierce debate and it turns into judgments about people, nobody raises a hand from the next meeting on. Even riskier is settling every conclusion in one-on-one briefings before the meeting and using the meeting only to rubber-stamp them. It may look like faster decision-making, but when a decision turns out wrong, there is no record to trace back through, so the same mistake repeats.
Ara LimExpert in global leadership, AI, and business communication
John KimInstructor John Kim, author of B2B Marketing Design and CEO of Nanum ConsultingUpper Echelons Theory, proposed in 1984 by Donald Hambrick and Phyllis Mason, explains that an organization's strategy and performance reflect the cognitive traits and experience of its top executives. It became the foundation of top management team research.
Company A, a Korean industrial-parts maker, is a mid-sized firm with 480 employees and annual revenue of around KRW 180 billion (≈ US$134,670,100). In the two-hour executive meeting every Tuesday, seven division heads reported results in turn, and a new equipment investment proposal was pushed back with 'let's look at it again next time' for the third quarter running. This covers the six months after the second-generation CEO took over. (Hypothetical example)
- The VP of HR reviewed the past four months of meeting minutes: 78% of all remarks explained the speaker’s own division’s results, and only 3 entries showed anyone asking a question about another division’s agenda item.
- The CEO changed the meeting to every other week for three hours, devoted the first 90 minutes to a single company-wide agenda item, and made one thing clear: 'today, sit here as a company executive, not as a division head'.
- For each agenda item, an executive from a different division was assigned to argue the opposing case. Reviewing a marketing investment proposal, the head of production said, “It’s not my budget, so I can ask freely,” and dug into the payback-period assumptions.
- The team recorded each decision, its assumptions, and a review date on a single page. Four months later it was clear that two of the three equipment-investment assumptions were wrong, and KRW 500 million (≈ US$374,100) of the KRW 1.2 billion (≈ US$897,800) was pulled back just before it was spent.
- Six months later, the share of meeting time spent on divisional reports fell from 78% to 41%, confirmed decisions per meeting rose from 0.8 to 2.4, and a capital equipment proposal that had sat for three quarters was settled in two weeks.