Safer Alternative Design (SAD)
Definition
A specific, concrete modification to a product that would have reduced the hazard in question while preserving the product's essential utility, and that was technically and commercially feasible at the time of manufacture.
- Field
- Products liability / design defect litigation
- Core test
- Feasibility at time of manufacture, not with hindsight
- Must show
- Hazard reduction plus preserved product utility
- Assessed by
- Risk-utility balancing, not consumer-expectation alone
Common questions
Why does the SAD have to be feasible at the time of manufacture?+
A design that only became possible with materials or technology developed later cannot fairly be used to fault a manufacturer for a decision made years earlier. Courts and expert witnesses fix the feasibility test to the state of the art at the manufacturing date, not the date of trial.
How does an SAD differ from simply removing the hazard?+
Removing the feature that causes harm often destroys what the product is for. An SAD has to keep the product functionally equivalent for its intended use while cutting the risk, otherwise it is not a genuine alternative but a different product.
Who typically has to propose and test the SAD in a case?+
A retained engineering expert usually builds or models the proposed alternative, cost it, and demonstrates it would have measurably reduced the specific hazard, since bare assertion that a safer design was possible rarely survives cross-examination.
Related terms
- Commercial Feasibility
- Whether the cost of the safer design, spread across expected production volumes, would have made the product unaffordable or unmarketable.
- Custom vs Mandatory Standard
- Voluntary industry standards represent custom in the industry; regulatory standards (mandatory by law) set the legal floor. A product can violate custom...
- Design Standard
- A document produced by a recognised body (ISO, ASTM, UL, EN, national authority) specifying minimum technical requirements for a product category. Meeting...
- Risk-Utility Calculus
- The balancing of expected harm (probability of injury multiplied by severity) against the burden of prevention (cost of the SAD plus any...
- Technical Feasibility
- The capacity to implement a design change with materials, processes, and knowledge available at the date the product was manufactured and sold.