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The Importance of Quality Software- By Egrove Systems




Quality can briefly be defined as a degree of excellence. High quality software usually
conforms to the user requirements. A customer’s idea of quality may cover a breadth of
features – conformance to specifications, good performance on
platform(s)/configurations, completely meets operational requirements (even if not
specified!), compatibility to all the end-user equipment, no negative impact on existing
end-user base at introduction time.

Quality software saves good amount of time and money. Because software will have
fewer

Defects, this saves time during testing and maintenance phases. Greater reliability
contributes to an immeasurable increase in customer satisfaction as well as lower
maintenance costs.

Because maintenance represents a large portion of all software costs, the overall cost of
the project will most likely be lower than similar projects.

Following are two cases that demonstrate the importance of software quality:

Ariane 5 crash June 4, 1996- Maiden flight of the European Ariane 5 launcher crashed
about

40 seconds after takeoff

- Loss was about half a billion dollars

- Explosion was the result of a software error

- Uncaught exception due to floating-point error: conversion from a 64-bit integer to a
16-bit

Signed integer applied to a larger than expected number

- Module was re-used without proper testing from Ariane 4

- Error was not supposed to happen with Ariane 4
- No exception handler

Mars Climate Orbiter – September 23, 1999 – Mars Climate Orbiter, disappeared as it
began to

Orbit Mars.

- Cost about $US 125-million

- Failure due to error in a transfer of information between a team in Colorado and a team
in California

- One team used English units (e.g., inches, feet and pounds) while the other used metric
units for a key spacecraft operation.



Egrove Systems Corporation is the best web design and Development Company in New
Hampshire. We are providing services using the technologies such as joomla, drupal,
ecommerce, magenta, zencart, word press, php etc. For more information
http://www.egrovesys.com

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The importance of quality software

  • 1. The Importance of Quality Software- By Egrove Systems Quality can briefly be defined as a degree of excellence. High quality software usually conforms to the user requirements. A customer’s idea of quality may cover a breadth of features – conformance to specifications, good performance on platform(s)/configurations, completely meets operational requirements (even if not specified!), compatibility to all the end-user equipment, no negative impact on existing end-user base at introduction time. Quality software saves good amount of time and money. Because software will have fewer Defects, this saves time during testing and maintenance phases. Greater reliability contributes to an immeasurable increase in customer satisfaction as well as lower maintenance costs. Because maintenance represents a large portion of all software costs, the overall cost of the project will most likely be lower than similar projects. Following are two cases that demonstrate the importance of software quality: Ariane 5 crash June 4, 1996- Maiden flight of the European Ariane 5 launcher crashed about 40 seconds after takeoff - Loss was about half a billion dollars - Explosion was the result of a software error - Uncaught exception due to floating-point error: conversion from a 64-bit integer to a 16-bit Signed integer applied to a larger than expected number - Module was re-used without proper testing from Ariane 4 - Error was not supposed to happen with Ariane 4
  • 2. - No exception handler Mars Climate Orbiter – September 23, 1999 – Mars Climate Orbiter, disappeared as it began to Orbit Mars. - Cost about $US 125-million - Failure due to error in a transfer of information between a team in Colorado and a team in California - One team used English units (e.g., inches, feet and pounds) while the other used metric units for a key spacecraft operation. Egrove Systems Corporation is the best web design and Development Company in New Hampshire. We are providing services using the technologies such as joomla, drupal, ecommerce, magenta, zencart, word press, php etc. For more information http://www.egrovesys.com