Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
Q1. PROBABILITY DENSITY FUNCTION
A probability density function (PDF) of a continuous random variable, is a function that
describes the relative likelihood for this random variable to take on a given value. The
probability of the random variable falling w
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
Probability Density Functions
Recall that a random variable X is continuous if
1). possible values of X comprise either a single interval on the number
line (for some A < B, any number x between A and B is a possible value)
or a union of disjoint interval
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
START
Selected Topics in Assurance
Related Technologies
Volume 11, Number 5
Understanding Series and Parallel Systems Reliability
Introduction
Reliability of Series Systems of n Identical and
Independent Components
Numerical Examples
The Case of Diffe
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
JOMO KENYATTA UNIVERSITY OF AGRICULTURE & TECHNOLOGY
COLLEGE OF ENGINEERING & TECHNOLOGY
UNIT:
RELIABILTY ENGINEERING (EEE 2503).
TITLE:
TAKE AWAY CAT II
LECTURER:
DR. MURAGE
CAT TWO
Derive the formula for calculating the reliability of a system comprisin
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
Jomo Kenyatta University of Agriculture & Technology
College of Engineering & Technology
Unit:
RELIABILTY ENGINEERING (EEE 2503).
Title:
ASSIGNMENT
Lecturer:
Dr. MURAGE
1. A bunch of 100 lamps is known to have 5% defectives. If 10 lamps are chosen at rand
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
Jomo Kenyatta University of Agriculture & Technology
College of Engineering & Technology
Unit:
RELIABILTY ENGINEERING (EEE 2503).
Title:
Lecturer:
TAKE AWAY CAT I
Dr. MURAGE
1. Explain the following terms as applied in reliability studies:
I.
II.
III.
IV.
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Spring 2016
1. Using the mortality data below, calculate the reliability and unreliability of the population.
Additionally, calculate the failure density f(t) and plot the curve
Reliability is the probability that a component/device/system will perform the intended
f
Jomo Kenyatta University of Agriculture and Technology
Reliability Eng.
ELECTRICAL 2503

Winter 2015
RELIABILITY ENGINEERING
ASSIGNMENT
1. Define reliability, risk, safety and hazard as applied in engineering
Reliability It is the study of process or the equipment failure frequency or operability.
Risk It is the study that determines the consequences of