Most managers, when they want to improve team performance, focus on the obvious interventions: hiring better people, setting clearer targets, or increasing performance pressure. The research on team effectiveness suggests that these are often the wrong levers — and that the most powerful drivers of team performance are less visible and less obvious.
Google's Project Aristotle — the most comprehensive study of team effectiveness ever conducted — found that who is on a team matters far less than how the team works together. The same research found that the single most powerful predictor of team performance was psychological safety: the shared belief that it is safe to take interpersonal risks.
This article outlines eight evidence-based strategies for improving team performance — strategies grounded in what the research shows actually works.
Strategy 1: Diagnose Before You Intervene
The single most common mistake in team development is intervening before diagnosing. A team whose performance is limited by unclear goals needs a different intervention from one limited by interpersonal conflict; a team limited by poor accountability needs a different approach from one limited by low capability.
Before investing in any team improvement initiative, run a validated team diagnostic. Key dimensions to assess: psychological safety, goal clarity, accountability, decision-making quality, trust, and the quality of feedback and communication. Our free Team Dysfunctions Assessment provides a structured baseline across these dimensions.
Strategy 2: Build Psychological Safety First
Amy Edmondson's research, confirmed by Google's Project Aristotle and dozens of subsequent studies, consistently finds that psychological safety is the foundation of high team performance. Teams where people feel safe to speak up, ask questions, admit mistakes, and take interpersonal risks outperform lower-safety teams across virtually every performance metric.
Building psychological safety is a leadership behaviour, not a team activity. It starts with the manager: modelling vulnerability (admitting uncertainty and mistakes), responding appreciatively to difficult information, inviting challenge, and ensuring that every team member's voice is heard and valued.
A useful starting point: run our free Team Psychological Safety Audit at /diagnostic/team-psychological-safety-audit to establish a baseline and identify specific areas for development.
Strategy 3: Clarify Goals and Roles at Every Level
Research by Patrick Lencioni identifies inattention to collective results — where team members prioritise individual or functional goals over team goals — as one of the five core dysfunctions of teams. The solution is explicit goal clarity: clear team objectives, clear individual roles in service of those objectives, and clear measures of team success.
The OKR (Objectives and Key Results) methodology, widely used in technology companies and increasingly in other sectors, provides a useful structure: define two or three ambitious team objectives, and for each objective, agree three to five measurable key results that will indicate success. Review them monthly.
Strategy 4: Develop Accountability Without Blame
The most common failure mode in team accountability is the binary: either no one is held accountable (accountability avoidance) or accountability is experienced as blame (accountability as punishment). Research shows that neither extreme produces high performance.
Effective accountability in high-performing teams is characterised by clear expectations, honest review of performance against those expectations, and a learning orientation when expectations are not met. The focus is on "What do we need to do differently?" not "Whose fault is this?"
Practical structures: weekly team standups with visible commitment tracking; end-of-project retrospectives focused on learning; monthly team performance reviews where results are discussed honestly.
Strategy 5: Invest in Team Coaching and Facilitation
Teams, like individuals, develop faster with external coaching and facilitation. A skilled team coach creates the conditions for the team to surface its own dynamics, identify its own blockers, and build its own solutions — in ways that are more lasting than any externally imposed intervention.
Research published in the Journal of Applied Behavioral Science found that team coaching interventions significantly improve team processes, psychological safety, and performance outcomes — and that the benefits compound over time as teams develop their own self-coaching capability.
Strategy 6: Build Trust Through Understanding Differences
Most team conflict is not about facts — it is about differences in working style, communication preference, and values. When a team member's directness is experienced as aggression, or their analytical rigour is experienced as excessive caution, or their process-orientation is experienced as obstruction, the conflict is actually a communication mismatch.
Personality profiling tools — particularly Insights Discovery, which uses a four-colour model to help team members understand their own preferences and those of their colleagues — are one of the highest-impact team building investments available. Understanding that a colleague's communication style has a logic — that they are not being difficult but are working from a different preference — transforms team dynamics.
Strategy 7: Create Structures for Learning and Reflection
High-performing teams are learning teams. They debrief their work, surface lessons, and continuously improve their processes. Low-performing teams often operate in perpetual delivery mode — moving directly from one project to the next without ever stepping back to ask what they can do better.
Three structures that build team learning: After Action Reviews (structured debriefs after significant projects or milestones), weekly team retrospectives (20 minutes at the end of each week to discuss what went well, what didn't, and what to change), and monthly team learning forums (peer sharing of insights, experiments, and lessons from individual learning).
Strategy 8: Develop the Manager's Coaching Capability
The most important variable in team performance is not team composition, team structure, or team strategy — it is the quality of the manager's leadership. Gallup's research finds that managers account for 70% of the variance in team engagement.
The most impactful thing an organisation can do to improve team performance is to develop managers' coaching capability: the ability to have development conversations that build individual capability, to give honest and specific feedback, to hold people accountable in ways that build ownership rather than resentment, and to create the psychological safety that enables teams to perform at their best.
Investing in management development — in leadership training, coaching skills training, and feedback skills — pays dividends across every dimension of team performance.
References
Edmondson, A.C. (1999) 'Psychological safety and learning behavior in work teams', Administrative Science Quarterly, 44(2), pp. 350-383.
Gallup (2025) State of the Global Workplace Report. Washington, DC: Gallup Press.
Google re:Work (2016) Understanding Team Effectiveness. rework.withgoogle.com.
Hackman, J.R. (2002) Leading Teams: Setting the Stage for Great Performances. Boston, MA: Harvard Business School Press.
Lencioni, P. (2002) The Five Dysfunctions of a Team. San Francisco, CA: Jossey-Bass.