News - Board and System Test

Test Solution for safety-related Software Development

18 July 2013 - TESSY, the tool for automated unit / module / integration testing of embedded software of Hitex Development Tools, was re-qualified for safety-related software development according to IEC 61508:2010 and ISO 26262:2011. The qualification was done by the TÜV SÜD and is valid since version V3.0.18 of TESSY.

TESSY fulfills the requirements for off-line support tools according to IEC 61508-3:2010. TESSY was classified as being class T2.

TESSY also meets the requirements of tool qualification according to ISO 26262-8 for all Automotive Safety Integrity Levels (ASILs). For the Tool Impact (TI) the value 2 was determined and the Tool Error Detection Level (TD) was assumed to have the value 3 resulting in value 3 for the Tool Confidence Level (TCL).

Tessy V2.9 already was qualified in December 2011 according to the above standards. The re-qualification became necessary with the release of the new major version. TESSY V3.0 introduces comprehensive extensions of the functionality, for instance the traceability of requirements to test cases.

This certificate eases the tool qualification process for TESSY users significantly, but does not make it trivial. The tool qualification stays in the responsibility of the user and needs – where required – complementary measures, for instance tests. To assist the user in such additional measures, optionally a so-called Tool Qualification Package (TQP) is provided. This package contains documents and test cases: The documents describe for instance the tasks TESSY accomplishes during the testing process and rates these tasks with regard to safety-related projects; the test cases are especially designed to check the tasks relevant for safety-critical projects. Would TESSY for instance determine the code coverage of a test object erroneously to 100%, then this error would probably go undetected during the further test process. Therefore it is important to check especially these measurements to raise confidence in the results. This Tool Qualification Package was extended in the course of the re-qualification at hand, to check also the extended functionality. Now it consists of more than 2300 test cases.

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