Last Updated S012019


Unit Name Safety Systems Engineering
Unit Code BIA208S
Unit Duration 1 Semester

Bachelor of Science (Engineering)

Duration 3 years    

Year Level Two
Unit Creator / Reviewer N/A
Core/Sub-Discipline: Sub-discipline
Pre/Co-requisites BIA108S
Credit Points


Total Course Credit Points 81 (27 x 3)

Mode of Delivery Online or on-campus. 
Unit Workload (Total student workload including “contact hours” = 10 hours per week; 5 hours per week for 24 week delivery)
Pre-recordings / Lecture – 1.5 hours
Tutorial – 1.5 hours
Guided labs / Group work / Assessments – 2 hours
Personal Study recommended – 5 hours

Unit Description and General Aims

The objective in presenting this unit is to impart to students the principles and application of the safety systems which are engineered to meet the demanding safety standards in the industry. The subject matter covered in this unit will include: hazard identification and protection – particularly in the context of international standards, certification and approvals; safety instrument and emergency shutdown principles and processes; and, the principles and practices of Hazard and Operability Studies (HAZOPS) – particularly in the context of managing safety in a team environment using the Six Level Life Cycle Method.

Learning Outcomes

On successful completion of this Unit, students are expected to be able to:

  1. Identify risks in hazardous areas.
    Bloom's Level 4
  2. Evaluate the hazard protection requirements and the principles of hazard management.
    Bloom's Level 5
  3. Apply the relevant standards, certification, and approvals for hazardous areas.
    Bloom's Level 3
  4. Perform risk assessment for potentially hazardous areas.
    Bloom's Level 5
  5. Assess the safety instrumentation and emergency shutdown safety requirements for machines and processes.
    Bloom's Level 4
  6. Perform HAZOP analysis.
    Bloom's Level 6

Student assessment

Assessment Type When assessed Weighting (% of total unit marks) Learning Outcomes Assessed

Assessment 1

Type: Multi-choice test / Group work / Short answer questions / Practical / Remote Lab / Simulation

Example Topic: Hazard identification, protection, standards, equipment.

Students may complete a quiz with MCQ type answers and solve some simple equations to demonstrate a good understanding of the fundamental concepts

Due after Topic 4 15% 1, 2

Assessment 2

Type: Multi-choice test / Group work / Short answer questions / Practical / Remote Lab / Simulation

Example Topic: Students will illustrate how risk assessment is done for a potentially hazardous area.

Students may provide solutions to simple problems on the listed topics

Due after Topic 6 20% 4

Assessment 3

Type: Multi-choice test / Group work / Short answer questions / Practical / Remote Lab / Simulation / Project / Report
Example Topic: PLCs, safety life cycle, SIL, Reliability analysis.
Students may complete a quiz with MCQ type answers or solve some simple problems or using software to complete a practical.

Due after Topic 9 20% 5

Assessment 4

Type: Examination

Example Topic: All topics

An examination with a mix of detailed report type questions and/or simple numerical problems to be completed in 3 hours

Final Week 40% 1 to 6

Attendance / Tutorial Participation

Example: Presentation, discussion, group work, exercises, self-assessment/reflection, case study analysis, application.

Continuous 5% 1 to 6

Prescribed and Recommended Readings


P. Gruhn, H. L. Cheddie, Safety Instrumented Systems - Design, Analysis, and Justification, 2nd Edition. ISA, 2006 - ISBN 978-1601193346 (available from the EIT eLibrary)


IDC Technologies, Practical HAZOPS, Trips and Alarms, IDC Technologies, Perth.
IDC Technologies, Practical HAZOPS for Engineers and Technicians, IDC Technologies, Perth.
IDC Technologies, Practical Hazardous Areas for Engineers and Technicians, IDC Technologies, Perth.

Journal, website


Notes and Reference Texts

Knovel library:

IDC notes and Reference texts as advised

Other material advised during the lectures

Unit Content

Topic 1

Introduction to Hazard Identification and Protection

1. Hazardous areas - introduction (material properties, explosions)
2. Risk assessment and equipment classification (zone concept)
3. Standards (British, European, North American, International)
4. Certification and approvals (Principles of IEx, EEx, AEx)

Topics 2 and 3

Hazard Protection

1. Protection in hazardous areas (theory, definitions)
2. Use of a range of protection techniques (encapsulation, pressurization, oil-immersion, and etc.)
3. Installation (requirements, earthing, bonding, operation, tools and test equipment)
4. Inspection and maintenance (use of tools and test equipment)

Topics 4 and 5

Safety Instrumentation and Emergency Shutdown Safety Requirements of Machines and Processes – Part 1

1. Management of safety instrumented systems (risk reduction, Safety Integrity Levels (SIL))
2. Design and performance of safety control systems
3. Scope, application, and requirements of IEC61508 and IEC61511
4. Features of safety PLCs
5. Safety Life Cycle (hazard analysis, risk assessment, safety specification)
6. Risk reduction (demand, continuous)
7. SIL targets (LOPA, risk graphs)
8. Fault tolerance and redundancy

Topics 6 and 7

Safety Instrumentation and Emergency Shutdown Safety Requirements of Machines and Processes – Part 2

1. Essential features of field devices
2. Equipment selection and certification
3. Safety software systems
4. Reliability analysis
5. Diagnostic and proof testing
6. Safety certified and smart instruments

Topics 8 and 9

HAZOPS – Part 1

1. HAZOPS (principles and practices)
2. Hazard studies and regulations
3. Six Level Life Cycle Model
4. Managing safety in a team environment (safety teams, team leaders, reporting, and recording)

Topics 10 and 11

HAZOPS – Part 2

1. Typical SIS design features and application examples
2. Risk assessment and risk matrix
3. Risk reduction and protection layers
4. Hazard analysis methods (FMEA, FTA, and LOPA)

Topic 12

Project and Unit Review

In the final week, students will have an opportunity to review the contents covered so far. Opportunity will be provided for a review of student work and to clarify any outstanding issues. Instructors/facilitators may choose to cover a specialized topic if applicable to that cohort.

Software/Hardware Used


  • OSHA's Hazard Identification Training Tool 
  • Software: DSS-100 Operator

  • Version: N/A

  • Instructions:  Remote Lab 13

  • Additional resources or files: N/A


  • N/A