The main research intent of this paper is to introduce the use of fault tree analysis (FTA) and failure mode and effects analysis (FMEA) in conjunction to analyse the risk and reliability of a complex mechatronic system in both qualitative and quantitative manner. The major focus is on handling imprecise and vague information with the help of fuzzy synthesis of information. A complex mechatroni...

One of possible ways to achieve a very high level of confidence in a system is to develop its adequate model and then to analyse the properties of this model. The paper presents how object oriented modelling extended with formal specifications is used to support FMEA of software intensive systems. The paper refers to the case study of a computerised railway signalling system.

PURPOSE The implementation and evaluation of a gravimetric i.v. workflow software system in an oncology ambulatory care pharmacy are described. SUMMARY To estimate the risk involved in the sterile i.v. compounding process, a failure modes and effects analysis (FMEA) in the oncology ambulatory care pharmacy was performed. When a volumetric-based process was used to reconstitute vials, the actu...

Increasingly complex systems lead to an interweaving of security, safety, availability and reliability concerns. Most dependability analysis techniques do not include security aspects. In order to include security, a holistic risk model for systems is needed. In our novel approach, the basic failure cause, failure mode and failure effect model known from FMEA is used as a template for a vulnera...

Despite of the popularity of the fuzzy Failure Mode and Effects Analysis (FMEA) methodology, there are several limitations in combining the Fuzzy Inference System (FIS) and the Risk Priority Number (RPN) model. Two main limitations are: (1) it is difficult and impractical to form a complete fuzzy rule base when the number of required rules is large; and (2) fulfillment of the monotonicity prope...

Failure mode and effect analysis (FMEA) is a useful tool to define, identify, and eliminate potential failures or errors so as to improve the reliability of systems, designs, and products. Risk evaluation is an important issue in FMEA to determine the risk priorities of failure modes. There are some shortcomings in the traditional risk priority number (RPN) approach for risk evaluation in FMEA,...

PURPOSE/OBJECTIVES To assess and improve the safety of hospital-based adult chemotherapy administration. DESIGN Prospective, systems-focused clinical risk assessment. SETTING An adult inpatient and outpatient oncology unit in a large urban hospital in the United Kingdom. SAMPLE 8-person nurse-led multidisciplinary team, which included managerial staff and patient safety researchers. MET...

anaging risk is not optional for organizations. Clause 0.1 of ISO 9004 mentions risk management in the same breath with cost and benefit considerations as being important to an organization, its customers and interested parties. Clause 5.4.2 also includes risk assessment and mitigation data as necessary inputs for efficient and effective quality planning. Some sectors, particularly aerospace an...