TTM4158 - Dependability and Performance Design


Examination arrangement

Examination arrangement: Written examination
Grade: Letters

Evaluation form Weighting Duration Examination aids Grade deviation
Written examination 100/100 4 hours C

Course content

The course gives a broad introduction to the design and quantitative evaluation of information and communication (ICT) systems, with focus on dependability of such systems and performance of computer and telecommunication networks. The following issues are covered:
- Dependability concepts: attributes (availability, reliability); faults / failure (failure process, failure semantics, fault handling and maintenance);
- Fault tolerance: types of redundancy, design principles and mechanisms;
- Methods for dependability modeling and analysis with emphasis on state diagrams;
- Software failure: modeling and impact;
- Survivability of networks, dependability evaluation of networks
- Traffic and performance concepts: traffic, delay/latency, jitter, loss, blocking, Kendall’s notation;
- Classic queueing theory models and methods: M/M/1; state-transition diagram; M/M/n/n; Erlang formulas; Jackson networks; M/G/1; P-K (Pollaczek Khinchine) formula; work-conservation law;
- Internet QoS: traffic and service specifications, architectures, mechanisms and QoS guarantee analysis.

Learning outcome

A. Knowledge:
1) Terminology and concepts used in specification, design, operation and evaluation of information and communication (ICT) systems, with focus on dependability and performance.
2) Principles, architectures and mechanisms of fault-tolerant/survivable design and operation of server systems and networks.
3) Fundamental models and methods for performance evaluation of computer and telecommunication networks / systems.
4) Architectures, mechanisms and basic analysis of Internet quality of service.

B. Skills:
1) To design systems with appropriate use of fault tolerance, recovery mechanisms and redundancy to meet their dependability requirements.
2) To evaluate systems quantitatively with respect to availability and reliability using Markov models.
3) To model and evaluate computer and telecommunication networks/systems quantitatively with respect to traffic and performance.

C. General competence:
1) Awareness of dependability as an important factor in the use and economics of systems, hereunder the potential impact of failures on commercial application, on the society, and on safety of humans and environment.
2) Capability of communicating, and carrying out basic-reasoning and creative thinking about traffic and performance challenges in computer and telecommunication networks / systems, as an element in a wider context.

Learning methods and activities

Lectures. Exercises in modeling and analyse. There is a mandatory semester assignment to be carried out in small groups, which must be approved to qualify for the final exam.

Compulsory assignments

  • Semester assignment

Further on evaluation

The written exam is given in English only. The exam can be answered in English or in Norwegian.
If there is a re-sit examination, the examination form may be changed from written to oral.

Specific conditions

Exam registration requires that class registration is approved in the same semester. Compulsory activities from previous semester may be approved by the department.

Course materials

To be announced at the beginning of the semester.

Credit reductions

Course code Reduction From To
TTM4120 3.7 2014-09-01
TTM4155 3.7 2014-09-01


Detailed timetable


Examination arrangement: Written examination

Term Statuskode Evaluation form Weighting Examination aids Date Time Room *
Autumn ORD Written examination 100/100 C 2017-12-20 09:00
  • * The location (room) for a written examination is published 3 days before examination date.
If more than one room is listed, you will find your room at Studentweb.