Organisational structures: hierarchical, flat and span of control

An organisational structure shows how a business is organised — who reports to whom, who makes decisions and how communication flows. The right structure speeds up decisions and motivates staff; the wrong one creates confusion, delay and disengagement.

Hierarchical (tall) structure

Many layers, narrow span of control. Common in large traditional firms (banks, government departments).

Advantages:

• Clear chain of command — everyone knows who they report to.
• Specialisation — managers oversee a small, specialised team.
• Career progression — many promotion levels.
• Closer supervision — narrow span of control.

Disadvantages:

• Slow decisions — pass up and down many layers.
• Communication distortion — message changes through layers.
• Expensive — more managers needed.
• Less staff empowerment — decisions made above.
• Inflexibility — hard to respond to change.

Flat structure

Few layers, wide span of control. Common in start-ups and small businesses.

Advantages:

• Fast decisions — fewer layers to traverse.
• Better communication — direct lines.
• Lower management costs.
• Empowerment — staff make decisions.
• Flexibility — easier to pivot.

Disadvantages:

• Wide span of control — managers stretched thin.
• Less specialisation — managers cover broader areas.
• Less career progression — fewer levels.
• Possible quality issues — less close supervision.

Centralised vs decentralised

Centralised: decisions made at the top by senior managers.

• Pros: consistent, controlled, lower cost (fewer managers needed).
• Cons: slow, distant from local needs, demotivating.

Decentralised: decisions delegated to local/branch level.

• Pros: faster, more local responsiveness, empowers staff.
• Cons: less consistent, higher manager cost, possible duplication.

Many UK businesses run a hybrid — central strategy, local execution. Example: Tesco's stores follow national pricing but local managers tailor product mix.

Span of control

The number of staff a manager directly oversees.

• Narrow span (3–6) — close supervision, more layers (tall structure). Suited to complex tasks needing oversight.
• Wide span (10+) — less supervision, fewer layers (flat structure). Suited to simple, repeatable tasks or skilled, autonomous staff.

Choice depends on: task complexity, staff skill, manager skill, technology (CRM systems can let one manager oversee 50+ remote workers).

Chain of command

The line of authority from the top to bottom. A clear chain means:

• Everyone knows who their boss is.
• Instructions flow down clearly.
• Accountability flows up.

A long chain (tall structure) can distort messages; a short chain (flat structure) is faster but managers may be overwhelmed.

Delegation

Passing authority and responsibility to a subordinate.

Advantages:

• Frees managers for strategic work.
• Develops staff skills.
• Faster decisions.
• Higher morale — staff feel trusted.

Disadvantages:

• Manager remains accountable — can't pass off blame.
• Risk of mistakes if delegated to wrong person.
• Some staff don't want extra responsibility.

Effective delegation needs: clear brief, training, support, trust.

Communication channels

• Top-down — instructions, policies (memos, all-hands meetings).
• Bottom-up — feedback, suggestions (surveys, suggestion boxes).
• Lateral — between peers in different departments.
• Diagonal — across different levels and departments.

Modern tools (Slack, Teams, intranets) make all four faster but also create information overload.

Real-world structures

• Spotify "squads and tribes" — small autonomous teams (squads) grouped into tribes. Famous for fast innovation.
• John Lewis Partnership — partnership model where staff share profits and have a say in governance.
• NHS — large, hierarchical, with clinical and managerial chains.
• Apple — relatively centralised under CEO; functional structure not divisional.

Examiner tips

For 6+ mark questions on structure, identify the type of business and match the structure. Start-ups need flat; banks need tall. Discuss trade-offs and conclude with a recommended structure.