Showing posts with label testing. Show all posts
Showing posts with label testing. Show all posts
Friday, April 29, 2022

Prerelease Errors Yield Post-Release Errors

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Software with a lot of prerelease errors will also have a lot of post-release errors. This is bad news for developers, but ful...
Tuesday, March 01, 2022

Validation and Verification

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Large software developments need as many checks and balances as possible to ensure a quality product. One proven technique is ...
Monday, August 23, 2021

Rotate People Through Product Assurance

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  In many organizations, people are moved into product assurance teams as a first assignment or after they have demonstrated poo...
Sunday, May 16, 2021

Product Assurance Is Not a Luxury

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  Product assurance includes: software configuration management software quality assurance verification and validation testing Of...
Friday, January 24, 2020

Brooks' Law

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Measuring a project solely by person-months makes little sense. If a project could be completed in one year by six people, does that mean t...
Saturday, December 07, 2019

Analyze Causes For Errors

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Errors are common in software. We spend enormous amounts of resources detecting and fixing them. It is far more cost-effective to reduce ...
Tuesday, October 22, 2019

Don't Integrate Before Unit Testing

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Under normal circumstances components are separately unit-tested. As they pass their unit tests, a separate team integrates them into meanin...
Friday, September 27, 2019

Achieve Effective Test Coverage

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In spite of the fact that testing cannot prove correctness, it is still important to do a through job testing. Metrics exist to determine ho...
Thursday, September 26, 2019

Use Effective Test Completion Measures

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Many projects proclaim the end of testing when they run out of time. This may make political sense, but it is irresponsible. During test ...
Monday, September 23, 2019

Use McCabe Complexity Measure

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Although many metrics are available to report the inherent complexity of software, none is as intuitive and as easy-to-use as Tom McCabe...
Friday, September 20, 2019

The Big Bang Theory Does Not Apply

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As a project nears its delivery deadline and the software is not ready, desperation often takes over. Suppose the schedule called for two...
Thursday, September 19, 2019

Always Stress Test

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Software design often behaves just fine when confronted with "normal" loads of inputs of stimuli. The true test of software is ...
Wednesday, September 18, 2019

Test Invalid Input

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It is natural and common to produce test cases for as many acceptable input scenarios as possible. What is equally important -- but also ...
Thursday, August 22, 2019

A Test Case Includes Expected Results

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Documentation for a test case must include the detailed description of the expected correct results. If these are omitted, there is no way f...
Monday, August 19, 2019

Use Black-box And White-box Testing

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Black-box testing uses the specification of a component's external behavior as its only input. It is mandatory to determine if the so...
Thursday, August 15, 2019

Track Errors To Find More Errors

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Conservative estimates indicate that, in large systems, approximately half of all software errors are found in 15% of the modules, and 80% o...
Tuesday, August 13, 2019

A Successful Test Finds An Error

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I have often heard a programmer or tester gleefully declare, "Great news! My test was successful. The program ran correctly." This...