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- Adlemo, Anders, 1957, et al.
(författare)
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Fault tolerance strategies in an existing FMS installation
- 1993
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Ingår i: Control Engineering Practice. - 0967-0661. ; 1:1, s. 127-134
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Tidskriftsartikel (refereegranskat)abstract
- This paper describes a case study of an FMS installation in which fault tolerance is modelled through the use of a description model called the General Recursive System (GRS). The GRS makes it possible to study different system configuration are described, called Hardware Configuration, Mission Configuration and Work Configuration. Fault tolerance, i.e. ways to overcome erroneous situations in the FMS installation, is obtained by choosing alternative system configurations. Alternative ways to describe different fault tolerance strategies within the FMS installation are illustrated through examples.
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- Adlemo, Anders, 1957
(författare)
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On Dependability in Distributed Computerized Manufacturing Systems
- 1993
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The concepts of dependability, fault tolerance, reliability and availability concerning computer systems had already emerged by the 1950's. These concepts were initially used in the area of computer hardware, but were then applied to the area of software and later to applications. This thesis is focused on the application of different aspects of fault tolerance to distributed computerized manufacturing systems. Its aim is to contribute to the almost new application field of fault tolerant manufacturing. The work contained in this thesis has followed four main directions. Work related to the first direction focus on the definition of a hierarchical tool called GRS (General Recursive System) that is used to model fault tolerance in hierarchical computerized manufacturing systems. Work related to the second direction has to do with system reconfiguration and its use to improve fault tolerance. In the work on this area, an adequate taxonomy is defined that describes in detail various aspects of fault tolerance in conjunction with manufacturing system reconfiguration. This taxonomy is applied in a case study of a flexible assembly line. Work related to the third direction focus on the accessibility of information and its importance in obtaining a fault tolerant system. In this work, it is shown how the use of cache memories in a manufacturing system can enhance fault tolerance in the case of data network partitionings. Another aspect discussed is the possible use of the material network as a source of data transportation. Both aspects are applied to the case study example that was used in the work performed in the area of the second direction. Work related to the fourth direction, which has only recently been initiated, relates to failure semantics in distributed computerized manufacturing systems. It is demonstrated in the work carried out in this area that a concise definition of the failure semantics for a manufacturing system is essential in order to obtain correct fault tolerance.
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- Adlemo, Anders, 1957-, et al.
(författare)
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Test case quality as perceived in Sweden
- 2018
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Ingår i: Proceedings - International Conference on Software Engineering. - New York, NY, USA : ACM Digital Library. - 9781450357494 ; , s. 9-12
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Konferensbidrag (refereegranskat)abstract
- In order to reach an acceptable level of confidence in the quality of a software product, testing of the software is paramount. To obtain "good" quality software it is essential to rely on "good" test cases. To define the criteria for what make up for a "good" test case is not a trivial task. Over the past 15 years, a short list of publications have presented criteria for "good" test cases but without ranking them based on their importance. This paper presents a non-exhaustive and non-authoritative tentative list of 15 criteria and a ranking of their relative importance. A number of the criteria come from previous publications but also from discussions with our industrial partners. The ranking is based on results collected via a questionnaire that was sent out to a limited number of randomly chosen respondents in the Swedish software industry. This means that the results are more indicative than conclusive.
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- Adlemo, Anders, 1957, et al.
(författare)
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Towards a True Flexible Manufacturing System
- 1994
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Ingår i: Proc of the 10th ISPE/IFAC Int. Conference on CAD/CAM, Robotics and Factories of the Future, CARS & FOF '94, Ottawa, Canada. ; , s. 401-410
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Konferensbidrag (refereegranskat)
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