Design of engineering systems or Engineering Design is usually a trade-off between maximizing safety and minimizing cost.
A Engineering design procedure that can accomplish both of these objective is highly desirable, but also difficult.
- Deterministic design procedures (i.e., ASD or WSD) do not provide adequate information to achieve the optimal use of the available resources to maximize safety and minimize cost.
- On the other hand, probabilistic-based design can provide the required information for optimum design.
- Probability, statistics, and reliability tools can help achieving the optimal design.
- Load and Resistance Factor Design (LRFD)
- Provides a more rational approach for new designs and configurations.
- Provides consistency in reliability.
- Provides potentially a more economical use of materials.
- Allows for future changes as a result of gained information in prediction models, and material and load characterization.
- Code Calibration.