Myers, G. J., Composite / Structured Design, Van Nostrand Reinhold Company, 1978.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....a module s relationship to other modules, that is, it measures the interdependence of two modules. The more connections between modules, the more dependent they are. Modularity and low coupling help confine the effects of changes to a single module. Yourdon and Constantine [10] and Myers [7] identified three factors related to module coupling: the number of interfaces, the complexity of the interfaces, and the type of information flow (data or control) along the interfaces. These factors affect visibility outside the interface, the amount of information exported through interfaces, ....

....more general problem of complexity or intellectual manageability of the systems we are trying to build. Intellectual manageability can be enhanced by organizing information in a coherent, structured form, by using appropriate abstractions, and by reducing the dependencies among system components [7]. At the code level, this approach led to the concepts of coupling and cohesion. In this paper, we show how a new organization of information, called an intent specification, along with a concept we call semantic coupling, can assist in creating system designs that reduce the effects of ....

Myers, G. J. Composite/Structured Design. Van Nostrand Reinhold Company, New York, NY, 1978.

....at the beginning, as a percentage of sale. While the function is small, that it performs several activities makes it non cohesive. Figure 2 contains a program equivalent to that of Figure 1. Though it is larger in size, as measured in number of The reader is encouraged to review the references [28, 38, 43] to assess our use of the word discovered. The notion of cohesion and the associative principles were actually identified by Stevens and Constantine by interviewing expert software designers. Procedure Sale Pay Profit (days: integer; cost: float; var sale: int array; var pay: float; var ....

Glenford J. Myers. Composite/Structured Design. Van Nostrand Reinhold Company, New York, NY, 1978.

....been subjected to any formal, systematic study. This is partly because Stevens et al. considered cohesion to be an attribute of design [4] Thus, they and other subsequent authors have been content with assessing the cohesion of a module by analyzing the natural language description of its purpose [14]. As a result, it has been accepted that there is no obvious measurement procedure for determining the level of cohesion in a module [6, page 200] A question that has not been asked earlier is: Can Stevens et al. s rules be used to determine the cohesion of a module from its source code Or ....

Glenford J. Myers. Composite/Structured Design. Van Nostrand Reinhold Company, 1978.

....smaller numbers of data bindings are found. 3 Concepts in Ada 3.1 Segments System segments in [19] are called either modules or components. The term module is unfortunately overloaded in the literature. There is disagreement on what should be considered as a module (component) Myers [29] suggests that a system module (component) is a set of executable statements satisfying the following criteria: ffl It is a closed subroutine. ffl It has the potential of being called from any other module in the program. ffl It has the potential of being independently compiled. The last two ....

....irregular behavior and its implications on the system s reusability. Design assessment is used to obtain an indication of the product quality, allowing for corrective action to be taken if necessary. Goals of a quality modular design include inter module independence and intra module integrity [29]. A well rated design should present a balance of these two major quality factors. Questions that can be asked for the above mentioned quality factors include the following: ffl What is the relative coupling among ABCs ffl How cohesive are the involved ABCs ffl Are there components with ....

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G. Myers. Composite--Structured Design. Van Nostrand Reinhold Company, 1978.

....software design and development process. The term coupling defines the strength of associations established by connections from one software module to another ( Stevens74] In the literature many different static approaches to measure the coupling degree of software systems were proposed, as in [Myer76], Yourdon79] Card90] Henry81] Fenton90] etc. In this paper we present a dynamic framework to measure the coupling of software systems. We introduce dynamic characteristics, program execution profiles and a program monitor system. The measurement of characteristics of a software system is ....

Myers G., Composite/Structured Design, Van Nostrand Reinhold Company, 1976

.... [2] By contrast, the satisfaction operators are independent, due to the simple type of the intermediate value passed between them ( 0,1] In terms of software engineering principles, this provides the least possible coupling between the operators, and thus the highest degree of modularity [13]. The classical approach describes a static relationship between the fuzzy sets in a rule s antecedent and consequent. This is a declaration of a logical dependency, related to the implication operator in classical logic. It is not active or operational. This does not make it wrong, as long as the ....

Myers, G., J., Composite/Structured Design, Van Nostrand Reinhold Company, New York, 1978.

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Myers, G. J., Composite / Structured Design, Van Nostrand Reinhold Company, 1978.

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