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Hierarchical control programs for systems evaluation

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The task of testing a complete operating and computing system has become increasingly difficult, primarily because of the growing complexity of today's systems. An operating system consists of a control program and a set of job programs; a computing system consists of at least one processing unit and various channels, control units, and input/output devices. Not only must each program and system device be individually tested to assure proper functioning, but the various interfaces between programs in the operating system and devices in the computing system must also be tested. Finally, all parts of the system must be pulled together for the complete systems test required to gauge the performance of the system and to check the functional relationship among operator, operating system, and computing system.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

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IBM Systems Journal  (Volume:7 ,  Issue: 2 )