CASE Tools for System Analyst :Types ,Advantages, Disadvantages
Case Tools Types Diagram tools. These tools are used to represent system components, data and control flow among various software Process Modeling Tools. Process modeling is method to create software process model, which is used to develop the Project Management Tools. These tools . CASE is the use of computer-based support in the software development process; a CASE tool is a computer-based product aimed at supporting one or more software engineering activities within a software development process; a CASE environment is a collection of CASE tools and other components together with an integration approach that supports most or all of the interactions that .
The term CASE was originally coined by software company, Nastec Corporation of Southfield, Michigan in with their original integrated graphics and text editor GraphiText, which also was the first microcomputer-based system to use hyperlinks to cross-reference text strings in documents — an early forerunner of today's web page link. GraphiText's successor product, DesignAid was the first microprocessor-based tool to logically and semantically evaluate software and system design diagrams and build a data dictionary.
While, at the time of launch, and for several years, the IBM platform did not support networking or a centralized database as did the Convergent Technologies or Burroughs machines, the allure of IBM was strong, and Excelerator came to prominence.
The goal of introducing CASE tools is the reduction of the time and cost of software development and the enhancement of the quality of the systems developed. The interest in CASE tools and environments is based on expectations about increasing productivity, improving product quality, facilitating maintenance, and making software engineers' task less odious and more enjoyable. CASE is the use of computer-based support in the software development process; a CASE tool is a computer-based product aimed at supporting one or more software engineering activities within a software development process; a CASE environment is a collection of CASE tools and other components together with an integration approach that supports most or all of the interactions that occur among the environment components, and between the users of the environment how to be a barista book the environment itself.
Many prior studies have reported limited use of CASE tools. In a survey of 53 companies, found that 39 Of the 14 companies who had tried CASE, five had subsequently abandoned use of the tools. People within these fourteen companies believed that use of CASE tools improved documentation quality, improved analysis, and resulted in systems that were easier to test and maintain.
However, they also found use of CASE tools difficult and time consuming. In a follow-up survey of thirteen managers who had been using CASE tools two years earlier, reported that continued CASE use could only be verified for four managers. The reasons for abandonment included cost, lack of measurable turns, and unrealistic expectations. When the term CASE is used, it is important to clarify what is being discussed. An upper CASE tool front end CASE provides support for the early stages in the systems development life cycle such as requirements analysis and design.
Integrated CASE tools support both the early and later stages. Further classifications usually list which functionalities are supported by the tool, such as data flow diagrams, entity relationships data models, etc. CASE Tools offer an excellent array of features that support the development and business community through its Automated Diagram Support feature.
The various popular features that aid the development community are listed below:. CASE technology is the automation of step by step methodologies for software and system development. CASE tools are characterized by the stage or stages of software development life cycle on which they focus. Since different tools covering different stages share common information, it is required that they integrate through some central repository system data dictionary to have a consistent view of such information.
In phases of software development life cycle integrated through a central data dictionary. Case Tools are used in many ways in our organizations. Case tools can be broadly classed into these broader areas:. While many organizations still use the SDLC methodology, it is often supplemented with other methods. They mainly use it while developing the following methodologies:.
The job of a systems developer may contain requirements analysis, process design, data design, and programming among other activities. But, not all systems developers do the same activities. One may spend most of his or her time on analysis; another, on design. The various activities that the system developers involve include Systems Analysis including feasibility studies and requirements definitionSystems Design including user interface, data, and process designProgramming or generating code.
Testing, Supervisory or other management tasks and Maintenance. CASE tools play an important role in helping the system developers to perform the task efficiently. The whole system is composed of many active objects. Active objects AO are categorized into several groups. Active objects in the same group are responsible for the same type of tasks. This is what we call horizontal division.
All AO-groups are organized hierarchically. For example, the group on top level is for users; the group on second level is for domains; the group on third level is for development knowledge; the group on fourth level is for tools; the group on fifth level is for technique support.
This is what we call the vertical division. For each group, there is a delegate which is a local server of that group.
The communication among different groups is through delegates at the corresponding levels. The system maintains multiple layers of knowledge and has the ability of self-learning and self-improvement. Especially, the system can do reasoning on incomplete information. Otherwise, the system cannot 'figure out' users' intentions and the interaction between a user and a tool will not be able to continue in some cases.
Each node can be how to cook beef stew meat in oven to a set of rules. Mixed knowledge representation is how to have a friend marry you for reducing the size of the network, and thus speeding up the learning process.
In neural network, an output can always be derived from any input, even if the input is incomplete. Self learning is a natural and standard process in a neural network. A diagramming tool, similar to DFD diagramming tool, might be useful for this purpose. Pipe-filter, event-trigger and message passing models are all useful means to realize the integration of CASE tools. Basically, software project development is a team based activity. A CASE tool should be able to support this feature.
For this purpose, it is necessary to model the work process, and the collaboration and coordination among team members. We hope to represent all these information through a work flow model. Currently, there are many ways to model a work flow for team based collaborative software development.
However, most of them are too strict to change dynamically on the fly. We suggest using decentralized process models, such as 'ViewPoint' Ewhich can be described visually and is also possible to cope with deviations during process enactment. We are sure that the next generation CASE tools will be able to operate in heterogeneous and distributed environments. JAVA is such a specification which allows for transparent access to applications operating on multiple computing platforms.
JAVA is possibly to become a de facto standard in the future. To develop platform independent CASE tools, some platform independent programming languages, such as Java programming language will be used. Helps standardization of notations and diagrams. Limitations in the flexibility of documentation. Help communication between development team members. May lead to restriction to the tool's capabilities. Automatically check the quality of the models.
Major danger: completeness and syntactic correctness does NOT mean compliance with requirements. Reduction of time and effort. Enhance reuse of models or models' components. Staff resistance to CASE tools. Norman, R. Brown, et al. Elshazly, H. Forte, G. Jallaart et ai. Ganesh Krishnamurthy CASE Tools. Edit this page if you have permission.
Google Docs -- Web word processing, presentations and spreadsheets.
Visible Analyst (VA) is one example of a CASE tool that enables systems analysts to do graphical planning, analysis, and design in order to build complex client/server applications and databases. Visible Analyst and another software product called Microsoft Visio . Software Engineering (CASE) tools is becoming more commonplace for all phases of the System Development Life Cycle (SDLC). These include data modeling tools, analysis and design specification tools, user interface prototyping tools and code generator tools. Not meaning to get on your 'case', but if your line of. May 17, · CASE Tools Stand for Computer Aided Software Engineering tools. As the name implies they are computer-based programs to increase the productivity of analyst.
Computer-aided software engineering CASE is the domain of software tools used to design and implement applications. CASE tools are similar to and were partly inspired by computer-aided design CAD tools used for designing hardware products. CASE tools are used for developing high-quality, defect-free, and maintainable software. The Information System Design and Optimization System ISDOS project, started in at the University of Michigan , initiated a great deal of interest in the whole concept of using computer systems to help analysts in the very difficult process of analysing requirements and developing systems.
Several papers by Daniel Teichroew fired a whole generation of enthusiasts with the potential of automated systems development. Another major thread emerged as a logical extension to the data dictionary of a database. By extending the range of metadata held, the attributes of an application could be held within a dictionary and used at runtime.
This "active dictionary" became the precursor to the more modern model-driven engineering capability. However, the active dictionary did not provide a graphical representation of any of the metadata. It was the linking of the concept of a dictionary holding analysts' metadata, as derived from the use of an integrated set of techniques, together with the graphical representation of such data that gave rise to the earlier versions of CASE. While, at the time of launch, and for several years, the IBM platform did not support networking or a centralized database as did the Convergent Technologies or Burroughs machines, the allure of IBM was strong, and Excelerator came to prominence.
CASE tools were at their peak in the early s. The other trend that led to the evolution of CASE tools was the rise of object-oriented methods and tools. Most of the various tool vendors added some support for object-oriented methods and tools. In addition new products arose that were designed from the bottom up to support the object-oriented approach. Andersen developed its project Eagle as an alternative to Foundation.
Several of the thought leaders in object-oriented development each developed their own methodology and CASE tool set: Jacobsen, Rumbaugh, Booch , etc. Eventually, these diverse tool sets and methods were consolidated via standards led by the Object Management Group OMG.
Fuggetta classified CASE software different into 3 categories: . CASE tools support specific tasks in the software development life-cycle. They can be divided into the following categories:.
They support traditional diagrammatic languages such as ER diagrams , Data flow diagram , Structure charts , Decision Trees , Decision tables , etc. Lower CASE Tools support development activities, such as physical design, debugging, construction, testing, component integration, maintenance, and reverse engineering. All other activities span the entire life-cycle and apply equally to upper and lower CASE. Workbenches integrate two or more CASE tools and support specific software-process activities.
Hence they achieve:. An example workbench is Microsoft's Visual Basic programming environment. It incorporates several development tools: a GUI builder, a smart code editor, debugger, etc. Most commercial CASE products tended to be such workbenches that seamlessly integrated two or more tools.
Workbenches also can be classified in the same manner as tools; as focusing on Analysis, Development, Verification, etc. An environment is a collection of CASE tools or workbenches that attempts to support the complete software process.
This contrasts with tools that focus on one specific task or a specific part of the life-cycle. CASE environments are classified by Fuggetta as follows: . In practice, the distinction between workbenches and environments was flexible. Visual Basic for example was a programming workbench but was also considered a 4GL environment by many.
The features that distinguished workbenches from environments were deep integration via a shared repository or common language and some kind of methodology integrated and process-centered environments or domain 4GL specificity.
From Wikipedia, the free encyclopedia. L Loucopoulos and V. Karakostas System Requirements Engineerinuality software which will perform effectively. Cengage Learning. ISBN Retrieved 25 November PC Mag. Ziff Davis, Inc. S2CID Retrieved Retrieved 3 Mar Categories : Computer-aided software engineering tools Data management. Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. GND : MA :