HiP-HOPS (Hierarchically-Performed Hazard Origin and Propagation Studies)

HiP-HOPS (Hierarchically-Performed Hazard Origin and Propagation Studies) is a model-based safety analysis technique originating from the University of Hull. It uniquely integrates top-down analysis (like Fault Tree Analysis) with bottom-up analysis (like FMEA). The method involves modeling a system's hierarchy and then analyzing how component failures propagate upwards to cause system-level hazards. Within risk management, HiP-HOPS is a specialized tool for operational risk assessment, crucial for complying with functional safety standards such as ISO 14971 (Medical Devices) and ISO 26262 (Automotive). Unlike standalone FMEA or FTA, it provides a more comprehensive view of failure causality, offering detailed technical evidence to support an organization's broader ISO 31000 risk management framework by precisely identifying design weaknesses.

Practical application of HiP-HOPS follows a structured, three-step process. Step 1: System Modeling. The system's architecture, such as a clinical workflow, is defined hierarchically using tools like SysML. Step 2: Failure Annotation. Potential failure modes (e.g., 'incorrect drug dosage administered') are identified for base-level components and annotated in the model. Step 3: Automated Analysis. The model is processed by a HiP-HOPS tool to automatically synthesize fault trees and FMEA reports, revealing how local failures lead to system-level hazards. For example, a medical device firm used HiP-HOPS to find that a specific software bug combined with a hardware fault could cause a 10% overdose—a risk missed by traditional FMEA. By fixing this pre-launch, they achieved a 40% reduction in estimated critical incident rates and passed their ISO 14971 audit successfully.

Taiwanese enterprises face three key challenges. First, a technical skills gap in systems engineering and safety analysis. The solution is phased adoption: start with an expert-guided pilot project and conduct internal workshops to build a core team within 6-12 months. Second, incomplete system documentation, making it difficult to create the required models. The mitigation strategy is to integrate formal modeling (e.g., using SysML) into the standard development lifecycle, starting with new or critical projects. Third, a perception of high initial cost versus unclear ROI. To overcome this, build a strong business case by quantifying the cost of non-conformance, such as product recalls or regulatory fines, positioning HiP-HOPS as an essential investment to prevent catastrophic financial and reputational damage.

Winners Consulting specializes in HiP-HOPS for Taiwan enterprises, delivering compliant management systems within 90 days. Free consultation: https://winners.com.tw/contact