Reliability and Maintenance Modeling with Optimization

12Approximated Estimation of Software Target Failure Measures Conforming IEC 61508

Shinji Inoue

Kansai University

Takaji Fujiwara

SRATECH Laboratory, Inc.

Shigeru Yamada

Tottori University

CONTENTS

• 12.1 Introduction

• 12.2 SIL and Target Failure Measures

• 12.3 Software Hazard Rate Modeling

• 12.4 Formulations of Target Failure Measures

• 12.5 Numerical Examples

• 12.6 Concluding Remarks

12.1 INTRODUCTION

Recently, the notion of functional safety is widely applied in several industrial fields due to the advancement of information processing technologies. Functional safety is maintaining a certain level of safety by functional aspects. Especially, an electrical/electronic/programmable electronic (abbreviated as E/E/PE) safety-related system is utilized ...