What a DPIA is for
A DPIA is a disciplined way of asking what could go wrong with people's data before you build, then fixing it in the design. It documents what data you process, why, the risks involved, and the safeguards you will put in place.
It is a core part of GDPR's data protection by design approach: think about privacy up front rather than bolting it on after launch.
When you need one
A DPIA is mandatory when processing is likely to be high risk, for example large-scale profiling, systematic monitoring, handling sensitive data at scale, or introducing new technologies whose effects are not yet well understood.
New AI features often fall into this category. Any system involving automated decision-making that significantly affects people is a strong candidate for a DPIA.
Turning risk into design
The real value of a DPIA is not the document but the thinking. Working through the risks usually surfaces concrete changes, such as minimising data, adding human review, or improving explainability.
When we scope AI and data-heavy projects, we build the DPIA thinking into the design phase, so privacy safeguards are part of the plan rather than a hurdle discovered at the end. It also strengthens your wider compliance position.