Private-sector organisations usually trade to generate profit, growth and shareholder or owner value. Their legal forms may include sole trader, partnership, limited liability partnership, private limited company or public limited company (GOV.UK, n.d.). In the UK, private-sector businesses are dominated numerically by small firms, while medium and large firms account for a disproportionate share of employment and turnover (Department for Business and Trade, 2025; Office for National Statistics, 2025). This matters for people practice because a start-up may need flexible job design, founder-led decision-making and broad roles, while a mature corporation may require more formal governance, specialist HR teams, succession planning and risk controls (CIPD, 2024).
Public-sector organisations are run by, or accountable to, government and exist to deliver public value, statutory services and policy outcomes. Their structures are often shaped by democratic accountability, procurement rules, public funding constraints, collective consultation arrangements and heightened scrutiny. A people strategy in this context must balance service quality, workforce resilience, fairness, equality duties, budgetary control and industrial relations.
Third-sector and voluntary organisations, including charities and community organisations, are mission-led and must demonstrate public benefit where charitable status applies (Charity Commission, 2014).
Social enterprises and community interest companies blend trading activity with social or community aims, which can create hybrid pressures: commercial discipline is needed, but legitimacy depends on mission, trust and stakeholder impact. In private-sector organisations, commercial impact is usually assessed through measures such as revenue, margin, productivity and market growth, whereas in public and third-sector settings impact must also be judged through public value, service outcomes, equity, trust and social benefit.
Structure describes how work is divided, coordinated and controlled. Mintzberg’s classic work identifies configurations such as simple structure, machine bureaucracy, professional bureaucracy, divisionalised form and adhocracy, reminding HR practitioners that there is no universally superior design (Mintzberg, 1980). Burns and Stalker (1994) similarly distinguish mechanistic systems, suited to stable conditions, from organic systems, suited to more uncertain and innovative environments. A high-control structure can improve consistency and compliance but may slow decision-making, while a more organic structure can accelerate learning and innovation but may create ambiguity unless accountability is clear. Structural choices influence the cost base, service quality, productivity and margin because they determine where work sits, how quickly decisions are made, how consistently services are delivered and whether roles are duplicated or effectively coordinated.
Common structural forms include hierarchical, functional, divisional, matrix, flat, project-based and network structures.
- A hierarchical organisational structure is a traditional model where the organisation is arranged in levels, with a clear chain of command from senior leaders down to employees. Each level has defined roles and responsibilities, and authority is typically concentrated at the top. While it provides strong control and accountability, communication can be slower due to multiple management layers.
- Functional structures group people by expertise, such as finance, operations, marketing or HR. They support professional depth, standardisation and economies of scale, but can create silos and weak customer ownership.
- Divisional structures organise around product, geography, customer segment or service line. They improve market focus and accountability for results but can duplicate resources and fragment people practice.
- Matrix structures combine two or more reporting dimensions, such as function and region. They are useful where expertise and market responsiveness must be balanced, but they increase role complexity, conflict and the need for strong collaboration norms (Hatch and Cunliffe, 2018).
- Flat, agile or team-based structures reduce hierarchy and can improve empowerment, speed and innovation. However, they require mature leadership, clear priorities, psychological safety and transparent career pathways (Ajayi and Udeh, 2024).
- Network and platform organisations rely on partnerships, contractors, outsourced services and digital systems; these can increase flexibility but raise issues around culture, employment status, knowledge retention and ethical supply-chain practice.
For senior people professionals, the key question is structural fit. Galbraith’s Star Model is useful because it links strategy, structure, processes, rewards and people, showing that changing reporting lines alone rarely improves performance (Galbraith, n.d.). The CIPD also stresses that organisation design should align the organisation’s shape and structure with strategy, while organisation development focuses on behaviour, culture and effectiveness (CIPD, 2025a; CIPD, 2025b). This distinction is important: a restructure may change boxes on a chart, but it will not deliver value unless systems, capability, leadership behaviours and employee relations also change.
Commercial impact is created when the people function can diagnose how structure affects cost, productivity, risk and value creation. Examples include identifying duplication after rapid growth, redesigning roles to improve customer responsiveness, building capability for digital transformation, or challenging spans of control that damage leadership quality (CIPD, 2024; CIPD, n.d. b). People professionals also need to anticipate unintended consequences: restructures can reduce trust, weaken inclusion, increase workload, unsettle key talent and create legal risk if consultation, selection and redeployment are poorly managed. High-level practice therefore requires evidence-led diagnosis, stakeholder engagement and a clear line of sight between organisational strategy, work design and measurable outcomes (CIPD, 2025a; Galbraith, n.d.).
Action Point
Review an organisation you know. What type of organisation is it, what structure does it use, and where is there evidence of misalignment between strategy, structure, culture, systems or people practice (Galbraith, n.d.; CIPD, 2025a)? Identify one people-related intervention that would improve performance, accountability or employee experience.