We always reason from the product, never from the cleanroom. The question is never "how clean is this room?": it is "what does this product need, and what can it still tolerate?" Everything else follows from that.

This is the difference at the heart of how Brookhuis works. Most contamination-control advice starts with the room: its ISO class, its air changes, its certification. We start with the product, what threatens it, at what particle size, and how much deposition it can absorb before quality suffers. The cleanroom is only ever the means; the product is the point. Reason from the room and you protect the specification. Reason from the product and you protect what actually matters and usually spend less doing it.

That is also why measurement alone is not enough. Data only creates value when someone can interpret it from the product’s point of view: connect a deposition rate to a real risk to this product, translate a standard into a practical decision, and weigh the cost of acting against the cost of not acting. That interpretation is what Brookhuis consultancy provides. We do not sell hours of generic advice, we bring specialists who have spent their careers on exactly this question, to companies whose products fail at the scale of a single particle.