SBI, GROW and radical candour are frequently presented as competing feedback models. They are not really alternatives, because they operate at different levels. SBI structures what you say in a single piece of feedback. GROW structures a whole developmental conversation. Radical candour describes the relational stance underneath both. A manager can use all three at once, and the most capable ones do.
Choosing between them is therefore the wrong question. The right question is what kind of conversation you are having: correcting a specific behaviour, developing a capability over time, or repairing a pattern of feedback that has not been landing at all.
Why feedback usually fails
Before the models, the failure modes — because most feedback problems are not solved by a better structure.
- It is about the person rather than the behaviour. "You’re disorganised" is an identity claim and will be defended. "The report arrived after the deadline three times this month" is an observation and can be discussed.
- It is too late. Feedback delivered weeks after the event has lost the detail that makes it credible, and the recipient reasonably asks why nobody said anything at the time.
- It is vague. "Be more strategic" gives the recipient nothing to do differently on Monday morning.
- It is never followed up. Feedback given once and never revisited signals that it did not matter much.
A manager who fixes those four things and uses no model at all will outperform a manager who applies SBI flawlessly to vague, late, personal feedback.
Feedback is a leadership skill, not an HR task
Feedback is often treated as something that happens twice a year, inside a review form. In practice it is one of the most frequent ways a manager shapes how a team works: what gets noticed, what gets repeated and what quietly stops. Every comment made, or withheld, in a meeting or a one-to-one tells people what the manager considers important.
That is why the four failure modes above are leadership problems before they are technique problems. Timing, specificity and follow-through reflect how much attention a manager gives their team, and attention is something leaders can deliberately develop. Managers who want to build that capability more broadly can explore the leadership and strategy training courses alongside the models below.
SBI: Situation – Behaviour – Impact
SBI, developed by the Center for Creative Leadership, structures a single piece of feedback into three components: the situation in which it occurred, the specific observable behaviour, and the impact that behaviour had. Its purpose is to strip out interpretation and leave something factual enough to discuss.
Worked example. Correcting behaviour in a meeting:
"In yesterday’s planning meeting [situation], you interrupted Sara twice while she was setting out the delivery risk [behaviour]. She stopped contributing after that, and we finished the meeting without hearing the concern she’d raised [impact]."
Then stop and let them respond. The most common error with SBI is delivering all three parts and then continuing into advice. The pause is where the conversation actually happens.
Best for. Specific, recent, observable incidents — corrective or positive. It works equally well for reinforcement, and using it only for criticism trains people to dread the structure.
Where it fails. Patterns rather than incidents. If someone has been consistently defensive for six months, an SBI statement about one instance addresses the symptom and misses the conversation that needs having. It is also mechanical if used verbatim every time — people notice the formula.
GROW: Goal – Reality – Options – Will
GROW, associated with Sir John Whitmore, structures a coaching conversation rather than a feedback statement. The manager asks questions across four stages so the other person reaches their own conclusions and commits to their own actions.
Worked example. Developing capability over time:
Goal: "What would good look like in these meetings six months from now?" — Reality: "What happens at the moment when someone challenges your position?" — Options: "What could you try differently? What else? What would someone you respect do?" — Will: "Which of those will you do, in which meeting, and what will you tell me afterwards?"
Best for. Development rather than correction. Situations where the person has the raw capability but has not worked out how to apply it, and where a durable change matters more than an immediate fix.
Where it fails. Under time pressure, and where the person genuinely lacks the knowledge to reason towards an answer. Coaching someone towards a conclusion they cannot reach because they do not have the information is a waste of both parties’ time — at that point, tell them. GROW also fails when used to disguise a decision already made: asking someone to generate options when only one is acceptable is manipulative and transparent.
Radical candour: care personally and challenge directly
Radical candour, set out by Kim Scott, is not a conversational structure but a description of the stance from which feedback is given. It combines two things managers usually trade off: caring personally about the individual, and challenging them directly about the work. Scott’s framework is most useful for its account of what happens when one of the two is missing.
Ruinous empathy is the one worth dwelling on, because it is committed by decent managers with good intentions. Withholding feedback someone needs in order to improve is not kindness; it becomes visible as unkindness at the point they are passed over for promotion, or dismissed, for a reason nobody had told them about.
Choosing in the moment
A short decision path covers most situations.
- Something specific happened recently and needs addressing — use SBI.
- Someone needs to build a capability over months — use GROW, with SBI supplying the concrete examples.
- You have given feedback repeatedly and nothing has changed — the problem is probably not the model. Check where you sit on the candour quadrants, and check whether you have ever named the consequence of the behaviour continuing.
The conditions that matter more than the model
Four delivery conditions do more work than the choice between frameworks: give it close to the event; give it in private if corrective; make it specific enough to act on; and return to it later to acknowledge change or note its absence. That final step is the one most often skipped, and it is the one that determines whether feedback is understood as a serious request or as a passing comment.
These are learnable skills rather than personality traits, and they improve considerably faster with observed practice than with reading. People leadership training courses build the conversations into the course itself, which is the only reliable way to find out whether your feedback lands the way you assume it does.
Frequently asked questions
-
What is the SBI feedback model?
SBI stands for Situation, Behaviour, Impact. Developed by the Center for Creative Leadership, it structures feedback by naming when something happened, the specific observable behaviour, and the effect it had. Its purpose is to remove interpretation and leave something factual that can be discussed rather than defended.
-
What is the GROW model used for?
GROW — Goal, Reality, Options, Will — structures a coaching conversation rather than a single piece of feedback. The manager asks questions across the four stages so the other person reaches their own conclusions. It suits development over time rather than correcting a specific recent incident.
-
What is ruinous empathy?
Ruinous empathy is Kim Scott’s term for caring about someone personally but failing to challenge them directly — withholding criticism to spare their feelings. It is the most common managerial feedback failure, and it becomes visibly unkind at the point the person is passed over or dismissed for a reason nobody told them about.
-
Which feedback model is best for managers?
They address different situations rather than competing. SBI structures a single piece of feedback about a recent incident; GROW structures a longer developmental conversation; radical candour describes the stance both should come from. Most capable managers use all three depending on the conversation.
-
How do you give feedback that actually changes behaviour?
Four conditions matter more than the model: deliver it close to the event, in private if corrective, specific enough to act on, and return to it later to acknowledge change or note its absence. The follow-up is most often skipped and determines whether the feedback is treated as serious.
