The Basic Sender/Receiver Communication Model
PMBOK v8 Definition
The basic sender/receiver communication model describes communication as a process consisting of two parties, defined as the sender and receiver. This model is concerned with ensuring that the message is delivered rather than understood. The sequence of steps includes: Encode (the message is coded into symbols such as text, sound, or other medium for transmission), Transmit message (the message is sent via a communication channel, which may be compromised by physical factors such as unfamiliar technology or inadequate infrastructure), and Decode (the data received is translated by the receiver back into a form useful to the receiver).
Why It Matters for the Exam
This concept appears frequently in PMI exam questions testing your understanding of communication management fundamentals and the distinction between message delivery and message understanding. You will encounter it in situational questions about communication breakdowns, as well as direct knowledge questions asking you to identify the correct sequence or purpose of the basic model versus the interactive model.
Key Points to Remember (for the exam)
- Core Purpose: The basic model ensures the message is delivered, not necessarily understood — this is the critical distinction tested on the exam
- Three Steps in Sequence: Encode → Transmit message → Decode (memorize this order)
- Transmission Risk: Physical factors like unfamiliar technology or inadequate infrastructure can compromise transmission
- No Acknowledgment: Unlike the interactive model, the basic model does NOT include acknowledgment or feedback steps
- Two Parties Only: Sender and receiver — no feedback loop, no confirmation of understanding
- Noise Factor: Noise and other factors may be present and contribute to loss of information in transmission and/or reception
- Communication Channel: The medium through which the message travels; its adequacy directly impacts transmission quality
Typical PMI Exam Example
A project manager sends a critical status update via email to the team using complex technical diagrams. Several team members later report they did not understand the update. According to the basic sender/receiver communication model, what has occurred?
Answer: The message was delivered (encoded and transmitted), but the basic model does not ensure understanding — only delivery. The issue lies in the decode step where receivers could not translate the symbols back into useful information.
PMI Exam Traps
-
Trap: Thinking the basic model includes feedback or acknowledgment Reality: The basic model stops at decode; acknowledgment and feedback belong to the interactive communication model
-
Trap: Confusing "message delivered" with "message understood" Reality: The basic model is only concerned with delivery; understanding requires the interactive model with feedback
-
Trap: Assuming "transmit message" step guarantees successful communication Reality: Transmission may be compromised by physical factors (unfamiliar technology, inadequate infrastructure) and noise
-
Trap: Mixing up the three steps or adding extra steps Reality: Only three steps exist in the basic model: encode, transmit message, decode — no acknowledge, no feedback/response
Important PMI Connections
| Related Concept | Relationship Type | Exam Attention Point |
|---|---|---|
| Interactive Communication Model | Complements | Interactive model adds acknowledge and feedback/response steps; exam tests which model includes which steps |
| Push Communication | Method of transmission | Push communication (email, reports) often uses the basic model; exam tests whether delivery equals understanding |
| Communication Methods | Application context | Interactive methods (meetings, calls) enable feedback; push methods align with basic model's one-way delivery |
| Communication Channels | Medium for transmission | Channel adequacy (technology, infrastructure) directly impacts transmission quality in the basic model |
Quick Review Questions
-
What are the three steps in the basic sender/receiver communication model, in correct sequence?
-
What is the primary concern of the basic communication model — ensuring message delivery or ensuring message understanding?
-
In the basic model, what happens during the "decode" step?
-
What factors may compromise the "transmit message" step according to PMBOK v8?
-
How does the interactive communication model differ from the basic model regarding feedback?
PMBOK v8 Reference
Section 2.4.4 - Communication Models (Basic Sender/Receiver Communication Model)