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Madhu Iyer's avatar

Interesting reframing, especially the extension from signal → impact. That shift alone probably removes half of the “feature factory” pathology we still see in many teams.

One thought that might strengthen the model even further: in practice these streams tend to behave less like a line and more like nested learning loops.

Between signal → output → outcome → impact, there are usually several feedback layers that need to run continuously:

• Output loop – Did we build the thing correctly?

• Implementation loop – Is it actually being used the way we expected?

• Outcome loop – Is user behavior changing?

• Impact loop – Did anything meaningful improve?

Without those loops, teams often declare “Done” while the real system dynamics remain invisible.

The same applies on the left side of the stream. Detecting signals works best when people explicitly treat them as hypotheses rather than truths. A simple pattern that has worked well in some contexts is:

S = Situation (facts)

O = Observation (pattern emerging)

H = Hypothesis (possible explanation)

N = Next step (experiment)

That turns the value stream into a continuous discovery–delivery–learning cycle, which seems especially relevant now that AI tools accelerate signal detection but also increase the risk of chasing noise.

In other words:

Signal → Impact is the span.

Learning loops are the engine that actually moves you through it.

Al S. Brown's avatar

Thanks for mentioning me in your post! It was AWESOME to see that article so soon after we talked. Customer delight can definitely come when you cut down the time between signal and value delivered.

I actually keep a Kanban board for my "work" in retirement, and the final column is actually bifurcated into two categories: "Success!" and "Abandoned". If I am not sure that the value has been delivered, I will leave the card in a "Review" column. I wait with it there to see if it delivered the value anticipated, before deciding if it is a success.

I got inspiration for the success/abandoned approach from Personal Kanban. If you don't already know Jim and Toni over at https://humanework.substack.com/ I highly recommend them to you. They do some good work.

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