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Modular and Iterative Methodology

An IT project best practice that applies to both testing and development is to use a modular and incremental approach to develop and test applications to detect potential defects earlier rather than later. This approach provides component-based test design, test script construction (automation), execution and analysis. It brings the defect management stage to the forefront, promoting communication between the test team and the development team. Beginning the testing process early in the development cycle helps reduce the cost to fix defects.

This process begins with the test team working closely with the development team to develop a schedule for the delivery of functionality (a drop schedule). The test team uses this schedule to plan resources and tests. In the earlier stages, testing is commonly confined to unit and module testing. After one or more drops, there is enough functionality to begin to string the modules together to test a business process.

After the development team completes the defined functionality, they compile and transfer the Siebel application into the test environment. The immediate functional testing by the test team allows for early feedback to the development team regarding possible defects. The development team can then schedule and repair the defects, drop a new build of the Siebel application, and provide the opportunity for another functional test session after the test team updates the test scripts as necessary.

Best Practice

Iterative development introduces functionality to a release in incremental builds. This approach reduces risk by prompting early communication and allowing testing to occur more frequently and with fewer changes to all parts of the application.