Optics has been in live deployment long enough now that a few lessons are starting to repeat.

The first is about signals.

When I started this work, I assumed the hardest problem would be volume. It has not been. There is plenty of public information. The harder work is judgment. Which signals are voluntary. Which are specific. Which mean something in context. Which are simply noise that sounds impressive because there is a lot of it.

We saw one of those recently. A senior leader mentioned on a podcast that they wanted exposure to a new geography. On its own, that is just an interesting remark. In context, it became useful. When a client later needed to approach that person, the conversation could begin somewhere real. Not flattery. Not a generic outreach line. Just context. The tone changed immediately.

The second lesson is about trust.

Boards do not need more information for its own sake. They need something they can actually use. Something timely enough to matter, clear enough to interrogate, and solid enough to carry weight in the room.

A Group CEO asked us recently for a live view of who was reshaping her sector. She was not asking for a shortlist. She wanted to see where capability was concentrating, what kinds of teams were taking shape, and what that might mean for her own succession thinking. What struck me was that the value sat as much inside the boardroom as outside it. The work did not just suggest who to call. It changed the quality of the conversation that followed.

The third lesson is about the edge of the evidence.

A FTSE 100 asked us to demonstrate diversity of experience across its succession pipeline within a specific area. Not demographics. Experience. We were able to do that in a way that was structured, auditable and grounded in what people had actually done and how they had led. The discussion became more rigorous as a result. It also became clearer where the record was strong, where it was thin, and where the committee still had to exercise judgment. That distinction has become more important to me over time.

When I left executive search, I thought the biggest gap was access to better evidence. Then I became more interested in context. Then governance. I still think all three matter. But I am increasingly convinced the harder question sits one level above them all.

What can a board fairly say it knows about a person, a pipeline, or a leadership market?

What is inference?

What is conviction?

And what needs to be recorded honestly as judgment, rather than allowed to drift by as though the evidence had already settled it? That is where my thinking has been moving recently.

The evidence for better leadership decisions does exist. The harder problem is making it usable, trustworthy and timely enough for serious people to act on it, while staying honest about what it can and cannot prove.

We are still learning. That is part of the point. But the work is now teaching me something I could not have reached from theory alone. Better leadership decisions are not only about seeing more. They are about knowing what a serious board is entitled to say on the strength of what it sees, what remains uncertain, and what still needs to be named for what it is: judgment.