Four Tests of Communication
Require four yeses before treating information as communicated
- Difficulty
- Easy
- Time to result
- ~days to results
- Steps
- 5
- Confidence
- 99%
McChrystal argues that owning phones, email, or other channels means only that people could communicate. Actual communication passes four tests: the message can technically reach the intended people; the sender will share it; the recipient can receive and understand it; and the information is accurate and timely. A failure at any test means communication has not occurred. The system also needs a two-way loop so the receiver can process, question, and answer the sender. That exchange allows opposing information and interpretations to move toward a more rational picture of reality. Because organizations cannot detect and respond to threats without this flow, McChrystal treats communication as table stakes for the wider risk immune system.
Origin
McChrystal presents the four tests as the practical standard for communication within the risk-control model discussed in Risk: A User's Guide.
Core principles
- 01A communication channel is only potential communication
- 02The sender must be willing to share the message
- 03The receiver must be able and willing to understand it
- 04Information must be accurate and timely
- 05Effective communication runs both ways
How to run it
- 1
Test technical reach
Verify that the chosen medium can deliver the message to the intended person or group. A device or channel alone does not prove delivery.
Pro tip Trace the message to the actual audience rather than checking only that it was sent.
Watch out Do not confuse access to a channel with successful communication.
- 2
Test willingness to send
Ask whether the sender will pass the information across silos, relationships, and approval lines. Surface incentives or uncertainty that make people withhold it.
Pro tip Check for unknown stakeholders as well as deliberate withholding.
Watch out Information that exists but is not shared cannot support a response.
- 3
Test reception and understanding
Confirm that recipients can receive the message in a form and language they understand. Account for mindsets that make them unwilling to hear it.
Pro tip Ask recipients to explain what they understood.
Watch out Transmission can succeed while comprehension fails.
- 4
Test quality and timing
Verify that the message is accurate enough to be useful and arrives while action is still possible. Correct stale information can be operationally worthless.
Pro tip Evaluate usefulness at the recipient's decision point.
Watch out Fast misinformation and late truth both fail this test.
- 5
Close the loop
Enable the recipient to respond, challenge, and refine the information. Use the exchange to correct both parties' understanding.
Pro tip Design for dialogue rather than one-way broadcast.
Watch out Without feedback, the sender cannot know whether communication occurred.
In the wild
McChrystal describes a person who technically can pass information but does not share it with another silo because of dislike, lack of awareness, or missing approval. The channel exists, yet the second test fails.
→ The organization has potential connectivity but no actual communication across the boundary.
Common mistakes
Counting tools as communication
Phones and email create the possibility of exchange, not proof that useful information moved and was understood.
Broadcasting without feedback
A one-way message prevents the iterative exchange needed to correct misunderstanding and approach a rational view.
Is it for you?
Best for
It is best for organizations that depend on fast, accurate information across roles, levels, or silos.
Not ideal for
It is not ideal as a substitute for deciding what action to take once communication succeeds.
From the transcript
“there are four tests that decide whether you actually communicate.”
“So, if you don't have a yes on all four tests, you don't really have communication.”
“So, it's got to be two-way.”
From the episode
#535: General Stanley McChrystal — Mastering Risk: A User's Guide