What are hard points in vehicle packaging and how are they managed?

Hard points are fixed dimensional constraints that cannot be changed without major impact. Examples include: Wheelbase and track (platform-defined), ground clearance, key dimensions affecting crash performance, wheel envelope, powertrain mounting points, and regulatory compliance points. Hard points are established early and managed through formal change control. Design within hard points uses soft points (adjustable dimensions) to resolve conflicts. Effective hard point management prevents costly late changes. The key is correctly identifying true constraints versus negotiable targets early in the development process.