09/17/2026
THE COMMUNICATION MODEL in from PMBOK -08
How a Message Travels From Sender to Receiver (and Back)
Every project relies on communication — and it always flows through the same basic model, no matter how simple or complex the message.
Understanding this model is the difference between messages that land and messages that get lost along the way.
Here's how it breaks down
THE BASIC ELEMENTS
Sender — The party who originates and sends the message.
Receiver — The party who receives and interprets the message.
Medium — The technology or mode used to carry the message.
Noise — Any interference or barrier that can distort delivery.
THE 5 STEPS
01 — ENCODE
Thoughts or ideas are translated into language by the sender.
Before anything is sent, the sender turns an idea into words, symbols, or visuals the receiver can understand. Clear encoding — plain language, the right level of detail — sets up everything that follows.
02 — TRANSMIT MESSAGE
The sender sends the message using a communication channel (medium).
The message travels through email, a call, a meeting, or a report. Along the way, it can be distorted by noise — distance, unfamiliar technology, inadequate infrastructure, cultural differences, or missing background information.
03 — DECODE
The message is translated by the receiver back into meaningful thoughts or ideas.
The receiver interprets the words, tone, and context to reconstruct the sender's intended meaning. Decoding is where misunderstandings often creep in, especially if noise has distorted the original message.
04 — ACKNOWLEDGE
The receiver signals that they received the message.
An acknowledgment — a reply, a nod, a read receipt — confirms the message arrived.
Important: acknowledgment only confirms receipt. It doesn't mean the receiver agrees with or fully understands the message.
05 — FEEDBACK / RESPONSE
Once understood, the receiver encodes their own thoughts and sends a response.
After decoding and understanding the message, the receiver becomes the sender — encoding their own reply and transmitting it back. This turns one-way transmission into a genuine two-way exchange.
THE FULL LOOP
Communication is a cycle, not a one-way street. The message flows Sender → Encode → Medium (noise may interfere) → Decode → Receiver, then loops back through Acknowledge and Feedback/Response.
Key takeaway: A nod or a read receipt only tells you the message arrived — not that it was understood or agreed with. Don't confuse acknowledgment with alignment.
Save this for your next PMP study session or team communication training.
Comment below: where does communication break down most often on your projects — encoding, transmission, or decoding?
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