Organisational Structures

Every business, from a two-person coffee van to a supermarket chain, needs a way of showing who reports to whom. That is the job of the organisational structure. It sets out job roles, responsibilities and lines of communication so that decisions flow from managers to staff and work gets done in the right order.

Tall and Flat Structures

A tall structure has many layers of management. Think of an NHS hospital trust: a chief executive sits above directors, who sit above senior managers, ward managers and then clinical staff. Each manager has only a few people reporting directly to them, which means tight supervision and clear career ladders — but also slow decisions, because a message has to climb many rungs.

A flat structure has few layers. A tech start-up of twenty people might have a founder, one team of engineers and one team of marketers — that’s it. Decisions are quick, staff feel trusted, and costs are lower because there are fewer managers to pay. The trade-off is that each manager supervises a lot of people, so they cannot give much individual attention.

Key Fact

Tall structures give tight supervision and clear promotion paths but slow communication. Flat structures give fast decisions and lower management costs but wider spans of control.

Span of Control and Chain of Command

The span of control is the number of people a single manager oversees. A narrow span (three or four staff) allows close mentoring; a wide span (fifteen or more) demands that workers manage themselves. The chain of command is the route an instruction travels from the top of the business to the bottom. A long chain means careful control; a short chain means fewer people reword the message, so it arrives clearly.

Delayering is the deliberate removal of layers of management. After the 2008 financial crisis, UK banks such as Lloyds and Barclays cut thousands of middle-management roles. The aim was to reduce wage costs, speed up decisions and give branch staff more responsibility. The risk is that remaining managers end up overloaded and staff morale drops as colleagues are made redundant.

Delegation

Delegation is when a manager hands a task, and the authority to complete it, to an employee further down the chain. A supermarket duty manager might delegate a promotional display to a supervisor. Good delegation motivates staff by showing trust, develops skills and frees managers for bigger decisions. Poor delegation — giving someone a task they are not trained for or refusing to let them decide — can cause mistakes and resentment.

Centralised and Decentralised Decisions

In a centralised business, head office makes the big calls. McDonald’s UK decides the menu, prices and suppliers centrally so that a burger tastes the same in Carlisle as it does in Cardiff. In a decentralised business, power is pushed down to local managers. A chain of independent garden centres might let each manager choose their own plant supplier to suit local demand.

A new start-up usually has a flat, decentralised structure because the team is small and speed matters. As the business grows it often adds layers to keep control — Deliveroo was famously flat when it launched in 2013 but added regional management as it expanded. Mature, safety-critical organisations such as NHS trusts and the Royal Navy stay tall because clear lines of responsibility matter more than speed. Neither shape is ‘better’ — the right answer depends on size, sector and how much local variation the business wants.

Communication and Job Roles

Structure shapes communication. In a tall organisation, instructions travel vertically and may be distorted as each layer reinterprets the message — think of a message passed from an NHS trust board down through directors, senior nurses and ward leaders before it reaches a junior nurse. In a flat one, staff can speak directly to the person making the decision, which tends to raise morale and speeds up a fix. Every structure also sets out job roles — the directors set strategy, managers plan, supervisors organise and operatives carry out the work. When roles overlap or are missing, work falls through the gaps, so the organisation chart and job descriptions must be kept up to date.

Communication can be vertical (up or down the chain), horizontal (between colleagues at the same level) or diagonal (across departments). A wide span of control usually pushes a business towards horizontal communication, because managers cannot brief every worker in person. Good organisational structure therefore sets up channels as well as layers — team meetings, internal messaging and shared dashboards all help decisions reach the right people quickly.

Appropriateness — No One-Size-Fits-All

There is no perfect structure. A two-person coffee van needs no chart on a wall, just a clear split of tasks. A national retailer needs a tall, partly centralised structure so that shop staff across hundreds of sites all follow the same standards. The appropriate structure depends on the size of the business, the sector it competes in, the experience of staff and how quickly the market changes. Fast-moving sectors like fashion and tech tend towards flatter, decentralised shapes so they can respond to customers; regulated sectors like banking and healthcare tend to stay taller so risks can be managed tightly.