Fundamentals of Business Laws and Business Communication · Types of Business Communication

Downward, Upward, Horizontal and Diagonal Communication Flow

Updated 10 October 2026 · Fact-checked

Communication flow is the direction in which messages move inside an organisation. Downward goes from superiors to subordinates, upward from subordinates to superiors, horizontal between people at the same level, and diagonal across different levels and departments. To solve a question, find who sends and who receives, then match the direction.

Understand Communication Flow: Downward, Upward, Horizontal, Diagonal

Every organisation has a structure with levels: directors at the top, managers in the middle, and staff at the bottom. Messages travel along or across this structure. The path a message takes is called the communication flow.

Downward and upward flows are together called vertical communication, because they move up or down the chain of command. Horizontal and diagonal flows are together called lateral communication, because they move across the structure.

Downward communication moves from a higher level to a lower level. Examples: a manager gives instructions, a company sends a policy circular, a supervisor assigns work. Its purpose is to direct, instruct, inform and give feedback. Its merits are clear authority and coordinated action. Its barriers are delay, distortion as the message passes through many levels, and the lack of a chance for employees to respond.

Upward communication moves from a lower level to a higher level. Examples: a sales executive sends a monthly report, an employee files a complaint, a worker gives a suggestion. Its purpose is to give feedback, report progress and raise problems. Its merits are that management learns the ground reality and employees feel heard. Its barriers are fear of the boss, filtering of bad news and a lack of trust.

Horizontal communication takes place between people at the same level, such as the production manager talking to the marketing manager. Its purpose is coordination and problem solving. Its merit is speed. Its barriers are rivalry between departments and lack of a formal channel.

Diagonal communication (also called crosswise) takes place between people at different levels who are in different departments and have no direct reporting line. Example: an accounts officer speaks directly to a plant manager of the production department. It saves time and helps cross-functional work. Its barrier is that it can bypass the chain of command and cause friction.

Upward and downward flows apply only to messages within the same reporting chain. A message between different levels in different departments, with no reporting link, is diagonal, even though it goes from a lower post to a higher one.

Key formulas to remember

Downward flow: Superior → Subordinate (same reporting chain); Instructions, policies, orders, feedback. Part of vertical communication.
Upward flow: Subordinate → Superior (same reporting chain); Reports, suggestions, complaints, feedback. Part of vertical communication.
Horizontal flow: Peer ↔ Peer (same level); Coordination between equals, in the same or a different department. Lateral communication.
Diagonal flow: Different level + different department, no reporting line; Crosswise communication. Lateral communication. Applies only when both the level and the department differ.

How to solve Communication Flow: Downward, Upward, Horizontal, Diagonal questions

Use this method for any question on communication flow.

1Identify the sender and the receiver in the situation.
2Compare their levels in the hierarchy: is the sender higher, lower or equal?
3If both are at the same level, the flow is horizontal.
4If the levels differ and the two are in the same reporting chain, the flow is downward when the sender is higher and upward when the sender is lower.
5If the levels differ, the departments differ and there is no reporting link, the flow is diagonal.
6For purpose, merit or barrier questions, recall the points specific to that flow.
7Check the options for words like vertical or lateral and match them to the correct group.

Quickest way: Level and department check

When to use it: When an MCQ describes a message between two named people or posts.

Ask: same level? If yes, answer horizontal.
If not, ask: is one the reporting superior of the other (same reporting chain)? If yes, answer downward or upward by who sends.
If not in the same chain, ask: different department too? If yes, answer diagonal.
Diagonal applies only when both level and department differ. Eliminate options that do not fit the direction, then confirm.

Common mistakes in Communication Flow: Downward, Upward, Horizontal, Diagonal

Calling diagonal communication the same as horizontal.
Both cross departments, so they look alike.
Fix: Horizontal needs the same level. Diagonal needs different levels and different departments.
Treating a manager's report to the director as downward.
Students focus on the manager's authority rather than the direction.
Fix: Look at the direction of movement. Lower to higher within the reporting chain is upward.
Thinking vertical means only downward.
The word suggests top to bottom.
Fix: Vertical includes both downward and upward flows.
Listing feedback as only an upward function.
Feedback is linked to employees reporting back.
Fix: Downward flow also carries feedback on performance from superiors.
Saying lateral communication means horizontal only.
Lateral sounds like sideways.
Fix: Lateral covers both horizontal and diagonal flows.

Worked examples

Example 1

The finance manager of a company sends an email to the head of the marketing department, who is at the same level, to agree on a promotion budget. Which type of communication flow is this?
A. Downward
B. Upward
C. Horizontal
D. Diagonal

Show the solution

Sender: finance manager. Receiver: marketing head.
Both are at the same level.
Same level means peer communication.
Downward and upward need different levels, so they are out. Diagonal needs different levels, so it is out too.

Answer: C. Horizontal

Example 2

A junior accounts clerk directly asks the factory manager of the production department for machine usage data, without going through her own supervisor. Which flow is this?
A. Diagonal
B. Horizontal
C. Downward
D. Upward

Show the solution

The clerk is at a lower level than the factory manager.
They are in different departments: accounts and production.
The factory manager is not in the clerk's reporting chain, so there is no reporting link between them.
Upward and downward flows apply only to messages within the same reporting chain. The message does go from a lower post to a higher post, but across departments with no reporting link, so it is not upward.
Different levels plus different departments with no reporting link is diagonal communication.
Horizontal is out because the levels differ. Downward is out because the sender is lower.

Answer: A. Diagonal

Exam tips

Most MCQs give a short situation. Decide sender level, receiver level and department before looking at the options.
Remember the groups: vertical = downward + upward; lateral = horizontal + diagonal.
Know one purpose, one merit and one barrier for each flow, as statement-based questions use them.
Diagonal is the easiest to confuse. Check for different level and different department together, and confirm there is no reporting link.
There is no negative marking, so always attempt every question after eliminating options.

Practice questions from Types of Business Communication

Communication Flow: Downward, Upward, Horizontal, Diagonal: frequently asked questions

What is diagonal communication with an example?

It is communication between people at different levels in different departments, with no direct reporting line. For example, a marketing executive asks the finance manager (a higher level, in another department) for cost figures directly, with no reporting line between them.

What is the difference between upward and downward communication?

Downward moves from superiors to subordinates and carries orders, policies and instructions. Upward moves from subordinates to superiors and carries reports, suggestions and feedback.

What are vertical and lateral communication?

Vertical communication follows the chain of command and includes downward and upward flows. Lateral communication moves across the structure and includes horizontal and diagonal flows.

Why is upward communication often weak?

Employees may fear criticism or hide bad news, and managers may not encourage feedback. Open-door policies, suggestion schemes and regular meetings help improve it.