QAA160 - Reliability

Outline info
Last revision date 2018-04-11 08:35:05.123
Last review date 2018-04-11 08:35:09.335

Subject Title

Subject Description
This subject introduces the fundamental concepts of reliability and applications in the workplace.

Credit Status
One elective credit toward the Quality Assurance Certificate Program

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Demonstrate an understanding of principles and techniques of Design Reliability.
2. Examine the different distributions used for reliability data analysis and prediction.
3. Participate in determining which non-mathematical tools such as Failure Mode and Effects Analysis(FMEA) & Fault Tree Analysis(FTA) are important in the early state of product development.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on for further information regarding cheating and plagiarism policies and procedures.

All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

QAA110 - Quality Concepts 
QAA120 - Basic Statistics andf SPC 
QAA140 - Advanced Statistical Techniques  

Topic Outline
What is reliability & history of failure rate 
Mean time between failures (MTBF) 
Mean time to failure (MTTF) 
Mean time to repair (MTTR) 

Normal distribution 
Central tendencies: Median Mode 
Dispersion: Range, Std deviation 
Area under the curve, population, sample 

Probability, permutation & combination 
Binomial, poisson & hypogeometric distr. 

Bathtub curve 
Reliability distributions: poisson, binomial, exponential, normal and weibull 

System reliability 
Series, parallel & series parallel systems 

Stand by parallel systems 
Perfect switching & imperfect switching with equal and unequal reliabilities 

Introduction to test of hypothesis 
Confidence intervals for the mean, sigma & MTBF 

Failure Reporting, Analysis & Corrective Action  System (FRACAS) 
Failure Mode and Effects Analysis (FMEA) 
Fault Tree Analysis (FTA) 

Design reliability and review 
Reliability management 
Safety and human factors 
Systems management and control availability 

Nature of failure 
Part selection, derating 
Reliability testing

Mode of Instruction
Lectures, class discussion and case studies.

Prescribed Texts
Reliability for the Technologies, Updated Second Edition, 2005, by Leonard A. Doty; Industrial Press, Inc. ISBN-10: 0831130245 / ISBN-13: 9780831130244

Reference Material

Required Supplies

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D+ 55%  to  59%
D 50%  to  54%
F 0%    to  49% (Not a Pass)
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online ( or at Seneca's Registrar's Offices.

Modes of Evaluation

  • Assignments must be submitted at the beginning of the class on the due date.
  • A late penalty of 10% per day is assessed for late assignments, including those not handed in at the beginning of class when due.
  • Material will not be accepted after one week following the due date and/or when the marked material is returned to students, whichever comes first.
  • Assignments are to be prepared by computer.

Absenteeism and Exams
  • Students should be aware that absenteeism almost guarantees an inability to achieve satisfactory grades.
  • Students who are absent for a final examination due to an emergency (e.g., motor vehicle accident, hospitalization or death in the family) may provide official documentation within five days of the missed exam and be provided a deferred exam at a later date.  Official documentation includes a death notice or an original doctor’s certificate identifying the date, length of time expected absence and the specific reason for the absence.  Examinations missed without official documentation and approval result in a grade of zero.
  • There are no deferred options for missed tests or midterms.  The value of missed tests, at the discretion of the Faculty, will be added to other evaluation components

English Proficiency
  • All written work should demonstrate the following characteristics for clarity and conciseness:
-writing is consistent with the rules of English grammar
-spelling and punctuation are correct
-sentences are structured correctly
-main ideas are supported with specific, relevant examples and reasons
-work flows logically through supporting statements/paragraphs
-work is arranged in correct format (e.g., as a report, essay)
-up to 10% of the final grade may be deducted on all work if the above English competencies are not met.

Format for Assignments
  • Students must use the standard, APA style for quoting sources.   Help is available at:

Grading is based on the following marking scheme:

Assignments 30%
Mid-Term Exam 30%
Final Exam 40%

Since this a professional credit subject, marking standards reinforce professional practice by demanding legible, tidy work. Written assignments should be well organized and grammatically correct, with proper spelling and punctuation. Late assignments are penalized. For particulars, please obtain standards, dates, etc. from your instructor. 

While attendance and participation in class discussions are not formally part of this evaluation schedule, you should be aware that absenteeism will almost guarantee your inability to achieve satisfactory grades. Some of the progress tests and quizzes may not be announced in advance and details of assignment requirements may be explained in class. There is no formal provision for make-up tests to replace tests you miss. 

Approved by: Sharon Estok