Software Engineering (10th Edition)
Software Engineering (10th Edition)
10th Edition
ISBN: 9780133943030
Author: Ian Sommerville
Publisher: PEARSON
Expert Solution & Answer
Book Icon
Chapter 11, Problem 11.1E

Explanation of Solution

Reliability Specifications:

Reliability testing is used to measure the reliability of the system. It is not easy to apply the reliability measurement practically. The difficulties that arise are as follows:

  • Operational profile uncertainty – The operational profiles that are based on experience with other systems will not be an accurate reflection of the real use of the system.
  • High costs of test data generation – Generating large volumes of data in an operational profile is very expensive.
  • Statistical uncertainty when high reliability is specified – Statistically significant number of failures is generated which allow accurate reliability measurements. Few failures occur when the software is reliable and it is difficult to generate new failures.
  • Recognition failure – One can identify deviations from a formal specification that they have, but if the specification is in formal language then there may be ambiguities. It is not obvious whether or not a system failure has occurred.

It is because of the above given difficulties, it is practically impossible to validate reliability specifications when these are expressed in terms of a very small number of failures over the total lifetime of a system.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Explain the concept of a fault tree analysis (FTA) in software safety. How is it used to identify potential failure modes and their causes?
Explore the concept of fault tolerance in safety-critical systems. What techniques and mechanisms can be employed to ensure that software continues to operate correctly in the presence of faults?
Building a fault-tolerant system may need you to consider how to conceal the failure from other running tasks. Is there anything you can do to cover up your failure? I'd want a full justification, if possible.
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Text book image
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Text book image
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
Text book image
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Text book image
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Text book image
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education