Automating HAZOP studies using D-higraphs

Automating HAZOP studies using D-higraphs

In this paper, we present the use of D-higraphs to perform HAZOP studies. D-higraphs is a formalism that includes in a single model the functional as well as the structural (ontological) components of any given system. A tool to perform a semi-automatic guided HAZOP study on a process plant is presented. The diagnostic system uses an expert system to predict the behavior modeled using D-higraph...

Hazop Studies Using a Functional Modeling Framework

In this paper we present a HAZOP Assistant based on D-higraphs, a functional modeling technique that gathers functional and structural information of the process under study. The Assistant and the methodology are presented and applied to an industrial case: H2S absorption and DEA regeneration. Its results are compared with other existing techniques showing that the Assistant fills the gaps and ...

A Functional approach to HAZOP studies

This paper presents a functional approach to HAZOP studies in which the plant is divided along strictly functional lines starting from the purpose of the plant and continuing down to the function of a single node, e.g. a pipe section. The approach leads to nodes with simple functions such as liquid transport, gas transport, liquid storage, gas-liquid contacting etc. From the functions of the no...

HAZOP

The Rigorous Generation of Java Mutation Operators Using HAZOP

This report proposes the use of a safety technique known as HAZOP (Hazard and Operability Studies) to rigorously generate mutation operators for Java. A set of Java mutation operators is proposed by applying HAZOP to the Java syntax definition and is compared to the operator sets of current mutation systems. Hypothesised flaws, which are also obtained by HAZOP application to Java language const...