Logical implementation

Any company competing in the world economy needs the flexibihty to accept orders on a worldwide basis and then assign them to individual plants to be filled. Such a function is logically implemented within the corporate-level information technology framework. 

Trambert, M.A. (1986). Cellular logic implementation on a generalized image processor applied to biomedical image processing. Anal. Quant. Cytol. Histol. 8,131-137. 

S. Pawlowski, P. Dutkiewicz, K. Kozlowski, W. Wroblewski, Fuzzy logic implementation in mobile robot control, in 2nd Workshop on Robot Motion and Control, (Oct 2001), pp 65-70... 

Logical implementation. Business processes related to supply chain configuration and information systems support requirements are implemented. 

Logical requirements covering the decision-making and logical implementation aspects... 

Having parameterised the model it is possible to convert a coverage measure into a residual fault estimate. Using the logic simulator we measured the coverage achieved using the customer tests that were applied to the Intermediate version of PLC logic implementation. The customer tests are summarised in Table 2. 

The Structural Domain describes the hierarchical logical implementation of the design in an abstract, technology independent fashion. For example, at the Register-Transfer Level the Structural Domain describes the design in terms of an abstract set of functional units, multiplexors, and registers needed to implement the register transfers required by the Behavioral Domain, plus a controller and control ROM. 

Cycle time - for the final synchronous logic implementation. 

We do not know which of the PLC faults were caused by errors in user requirements or implementation. Common user requirement flaws cannot be mitigated by diverse logic implementations. Section 6 provides an example where we assume the fault density estimates relate to diverse implementation faults. 

Let us remind ourselves of what we aim to do during testing. We aim to demonstrate compliance with a specification. In order to do this the specification will have been interpreted to produce test cases. Test cases will have pre and post conditions. Thus we must establish and observe the pre conditions and observe the post conditions. We must know when the pre conditions are met so that we can start execution of the process and we must know when the post conditions should have been met so that we know when to record the test results. Establishing pre conditions during testing will depend on the controllability of the system under test, which will in turn depend on interfaces provided and on the logic implemented within the PES. 

Documentation of the current control and safety logic implemented in both the BPCS and the SIS is maintained at all times. Any changes are documented at the time they are implemented. Hard copies of the documentation, fully describing the systems and their functions, are maintained for reference. 

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