Software Engineering basics - Factors of Quality Software & Evolution of Quality Software
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Factors of Quality Software
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Evolution of Quality Software
1. Factors of Quality Software
These are the main things that make software "high quality." Think of them like ingredients in a good recipe. If you include them all, you get great software!
a. Functionality
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The software does what it’s supposed to do.
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Example: A calculator app gives the correct result when you add or multiply.
b. Reliability
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The software works well without crashing or errors.
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Example: An online exam system that doesn’t freeze during tests.
c. Usability
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It’s easy to use and understand, even for beginners.
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Example: A student attendance app with simple buttons and instructions.
d. Efficiency
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The software uses less memory, battery, and time.
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Example: A video app that runs smoothly without using too much data.
e. Maintainability
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It’s easy to fix bugs or add new features.
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Example: A developer can quickly update a school website with new events.
f. Portability
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The software works on different devices or systems.
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Example: A learning app that runs on Android, iPhone, and laptops.
2. Evolution of Quality Software
Now let’s see how software quality has improved over time — like how phones went from basic models to smart devices, software has also evolved.
1st Stage: Basic Functionality
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Early software was simple and focused only on getting the job done.
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Quality = It works.
2nd Stage: Reliability & Performance
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People wanted software that didn’t crash and worked faster.
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Quality = It works and doesn’t break.
3rd Stage: Usability
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As more non-technical users started using software, it had to be user-friendly.
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Quality = Easy to use.
4th Stage: Security and Maintainability
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As software got more complex, it needed to be safe from hackers and easy to update.
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Quality = Safe, stable, and easy to fix.
5th Stage: Modern Quality Focus
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Today, quality includes everything: Speed, security, looks, ease of use, and user satisfaction.
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Quality = A complete, smooth experience across all devices