Introduction to Software Safety

Introduction to Software Safety

Introduction

The Introduction to Safety course will provide delegates with a general
appreciation of safety engineering issues in the context of a typical systems
development life-cycle.

Session 1 - Introduction to Safety (15 min)

Session 2 - The Need for Safety (60 min)

• TO 2.1 Complex, software intensive systems difficult to develop.
• TO 2.2 Examples of system failure leading to fatal accidents; Examples of software failures leading to accidents.
• TO 2.3 Safety Management Systems.
• TO 2.4 H&S focus is physical hazards.
• TO 2.5 Functional safety focus is system functional failures.
• TO 2.6 Using People, Procedures and Equipment (HW, FW & SW).

Session 3 -Basic Concepts (60 min)

• TO 3.1 Safety Definitions (from IEC 61508); Risk Definition; As Low As Reasonably Practicable (ALARP).
• TO 3.2 Risk Matrix; Typical Accident Sequence.
• TO 3.3 Error Definition; Fault Definition; Failure Definition.
• TO 3.4 Random and Systematic Failures; Hazard Definition.

Session 4 - System Safety Assurance (90 min)

• TO 4.1 System Safety:
  • Hardware
  • Software
  • Human Factors.
• TO 4.2 Safety Requirements:
  • Functional Safety Requirements
  • Safety Integrity Levels.
• TO 4.3 Safety Life-Cycle; Safety Cases; Safety Argument; Safety Evidence.
• TO 4.4 Describe the typical contents of a Safety Management Manual and explain the safety processes and responsibilities detailed therein.

Session 5 - Hazard Analysis Overview (120 min)

• TO 5.1 Functional System Description
• TO 5.2 Identifying Credible Accidents
  • Examples.
• TO 5.3 Preliminary Hazard Identification
  • Example HAZOPS.
• TO 5.4 Accident Sequences
  • Example Event Tree Analysis.

Session 6 - Risk Assessment Overview (120 min)

• TO 6.1 Accident Target Setting
• TO 6.2 Residual Hazard Risks Calculation
• TO 6.3 Target Setting:
  • Tolerable Hazard Occurrence Rates (THOR)
  • Safety Target On Function (STOF)
  • Safety integrity Levels.
• TO 6.4 Causal Factors identification (Fault Tree Analysis)
• TO 6.5 Safety Target Achievement

Session 7 - Safety Management (60 min)

• TO 7.1 Standards and Markets:
  • System Safety Standards
  • Software Safety Standards
  • Firmware Safety Standards.
• TO 7.2 Integrating Safety Management
• TO 7.3 Safety Assurance Processes; Safety Achievement Processes; Safety Promotion Processes.

Course Critique.