Test design happens to be the most prolonged phase of a test sub-project. This is often the case when both automated and manual test scripts development processes are being used, so enough time should be allotted up front for the development of tests.
A test manager in this project has established the following dependency: test development cannot begin until he has received prior approval for his cost estimates, possibly with some subsequent changes. Many test engineers prefer not to start development of tests until they are sure they are going to need the testware: test data, scripts, tools, scripts, test environment configurations, – that they are about to develop for the later execution of tests.
Dependencies between the development activities show when the test manager prefers to complete these development activities. In a number of situations, his preferences are based on the priorities of the risks covered by the tests that need to be developed. For instance, document management functionality is considered to be a greater risk than the installation, normal operation and maintenance. Therefore, a test designer should finish developing test scripts for manual document management functionality prior to starting to update test scripts for the installation, normal operation and maintenance.
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Sometimes the order in which project participants prefer to develop tests is dependent on when aspects or parts of the system are ready for testing. For instance, the load, performance, volume and capacity suite of tests is slightly more important (in relation to the priority of quality risks) than a suite of integration tests, but the basic functions of the document management system will need to be included in the system before the test engineer can start testing the performance. Integration and system testing will begin as soon as the first pair of interacting components is ready. Thus, the engineer will develop integration test scripts and tools before updating the set for performance and load tests.
Part of test development process is related to updating existing manual and automated test scripts. Naturally, complex and voluminous test scripts take longer to update than shorter ones. For example, one test manager and his assistant estimated ten days in order to update the installation, normal operation and maintenance tests, and allowed just five days to update the error handling tests.
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