STK3405 – Introduction to risk and reliability analysis

Schedule, syllabus and examination date

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Course content

STK3405 provides the foundation of probability theory needed to compute the reliability of a system, i.e., the probability that a system is functioning, when the reliabilities of the components which the system is composed of are known. Examples of systems are energy systems and networks. The course will also cover various examples of use of risk analysis for industrial applications. The material is illustrated by different simulation techniques. STK3405 is an introduction to more advanced studies, but is also suitable as a support course to studies in other fields and as further education for realists and engineers.

Learning outcome

After completing the course you:

  • know what coherent systems are, and can represent such systems by paths and cuts;
  • can compute the reliability for systems of components;
  • know what discrete event simulation is, and can apply different simulation techniques to do computations related to risk- and reliability analysis;
  • can compute the reliability importance of components;
  • can perform a risk- and reliability analysis in various practical situations.


Students who are admitted to study programmes at UiO must each semester register which courses and exams they wish to sign up for in Studentweb.

If you are not already enrolled as a student at UiO, please see our information about admission requirements and procedures.


Formal prerequisite knowledge

In addition to fulfilling the Higher Education Entrance Qualification, applicants have to meet the following special admission requirements:

  • Mathematics R1 (or Mathematics S1 and S2) + R2

And in addition one of these:

  • Physics (1+2)
  • Chemistry (1+2)
  • Biology (1+2)
  • Information technology (1+2)
  • Geosciences (1+2)
  • Technology and theories of research (1+2)

The special admission requirements may also be covered by equivalent studies from Norwegian upper secondary school or by other equivalent studies (in Norwegian).

Recommended previous knowledge

STK1100 – Probability and Statistical Modelling, MAT1100 – Calculus, MAT1110 – Calculus and Linear Algebra, MAT1120 – Linear algebra, MAT-INF1100 – Modelling and computations, INF1000 – Introduction to object-oriented programming (continued) and INF1010 – Object oriented programming (continued).

Overlapping courses

*The information about overlaps for discontinued courses may not be complete. If you have questions, please contact the Department. 


2 hours of lectures and 2 hours of exercises per week. Two compulsory assignments have to be handed in.


2 compulsory assignments.

Final written examination.

Examination support material

Approved calculator.

Information about approved calculators (Norwegian only)

Language of examination

Subjects taught in English will only offer the exam paper in English.

You may write your examination paper in Norwegian, Swedish, Danish or English.

Grading scale

Grades are awarded on a scale from A to F, where A is the best grade and F is a fail. Read more about the grading system.

Explanations and appeals

Resit an examination

This course offers both postponed and resit of examination. Read more:

Withdrawal from an examination

It is possible to take the exam up to 3 times. If you withdraw from the exam after the deadline or during the exam, this will be counted as an examination attempt.

Special examination arrangements

Application form, deadline and requirements for special examination arrangements.


The course is subject to continuous evaluation. At regular intervals we also ask students to participate in a more comprehensive evaluation.

Facts about this course






Every autumn


Every autumn

Teaching language

Norwegian (English on request)