JSD - Jackson system development
Jackson System Development (JSD) is a linear method of system development created by Michael A. Jackson and John Cameron in the 1980s. It comprises the whole software life cycle directly or providing a framework for more specialized techniques.
The main principles of JSD's work are:
- JSD method lets describe and model the real world, not specifies and not structures the function performed by the system.
- The time-ordered world must be time-ordered itself, JSD depicts the progress in the real world that models it.
- The implementation of the system is based on transformation of specification into efficient set of processes.
Jackson System Development includes three main stages, each of those is divided into steps and sub-steps:
- Modelling stage (analysis) - includes the entity/action step and entity structures step; on this stage is created a set of Entity Structure Diagrams (ESDs) and are identified the entities in the system, the actions, and the attributes of the actions and entities.
- Network stage (design) - contains the initial model step, function step, and system timing step; on this stage is developed a System Specification Diagram (SSD) or a Network Diagram which use rectangles to depict the processes and diamonds to represent their relationships. This stage defines the simulation of a real world, adds the executable operations and processes, and provides the synchronization among processes and introduces the constraints.
- Implementation stage (realization) consists of the implementation step which converts an abstract network model into a physical system and represents it as a System Implementation Diagram (SID).
When implementing the Jackson System Development method and designing JSD diagrams, you can succesfully use the powerful and helpful tools of ConceptDraw DIAGRAM software extended with Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park.
Example 1. JSD in ConceptDraw DIAGRAM software
Entity-Relationship Diagram (ERD) solution offers a lot of predesigned examples, samples and templates, and 2 libraries:
- ERD Chen's Notation library
- ERD Crow’s Foot Notation library
with numerous collection of ready-to-use vector objects for designing diagrams in minutes.
Example 2. Jackson system development - JSD
This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park and shows the Jackson system development (JSD).
Use the predesigned objects, templates and samples of the Entity-Relationship Diagram (ERD) solution for ConceptDraw DIAGRAM to create your own professional ERD and JSD diagrams quick and easy.
All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Entity-Relationship Diagram (ERD) Solution is available for all ConceptDraw DIAGRAM or later users.
TEN RELATED HOW TO's:
Entity structure diagram (ESD) notations may be created in the ConceptDraw DIAGRAM same as any other diagram, including a Jackson Structured Programming (JSP) Diagram. Having the Jackson Structured Programming (JSP) Diagrams solution may simplify the work of drawing the needed illustration representing the given data within only a few minutes. Having the pre-made examples of the JSP diagrams, any ConceptDraw DIAGRAM user is able to make his own unique as well as smart looking drawing in a fun and entertaining way.
Picture: Jackson Systems
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Database model is a graphic representation need at the beginning of project development. You won't have any problems with drawing ER diagrams on a Mac anymore with ConceptDraw DIAGRAM application. Special libraries that contain all the symbols of both Chen's and Crow’s foot notation allow you to start database modeling within a few minutes.
Creating entity-relationship diagrams on Mac is fun and effortless when you use a software designed for professional ERD drawing tailored to specific characteristics of Apple OS X. ConceptDraw DIAGRAM is a business diagramming software for those using OS X.
The Entity-Relationship Diagrams solution for ConceptDraw has 2 libraries containing about 50 vector icons, depicting ERD symbols of the most popular Chen's and Crow’s Foot Notations. The other valuable component of the solution is a collection of ERDs samples and templates that can be opened on Macs and PCs.
Picture: Drawing ER diagrams on a Mac
Related Solution:
Describing the way data flows through an information system might become a subject of a study. One of the kinds on a data flow diagram is called Gane Sarson Diagram after its authors, and it slightly differs from other notations. Process symbols in this notation are depicted as rounded rectangles connected with arrows representing data flows.
This is a sample of data flow diagram. It demonstrates utilization of the Gane-Sarson notation for making DFD on the example of an online appointment system of the Health Centre. This sample is used the vector objects library of Gane-Sarson DFD notation supplied by the ConceptDraw solution for data flow diagramming. It contains all symbols of the Gane-Sarson notation including connectors, jumps, and processes. This solution can be successfully utilized to generate DFDs for business documentation, and presentations.
Picture: Gane Sarson Diagram
ConceptDraw DIAGRAM extended with Data Flow Diagrams solution is the best diagramming and vector drawing software for quick and easy designing the Data Flow Diagram Example of any complexity.
Picture: Data Flow Diagram Example
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ConceptDraw DIAGRAM diagramming and vector drawing software offers the Entity-Relationship Diagram (ERD) Solution from the Software Development Area for ConceptDraw Solution Park. How many examples contains the Entity-Relationship Diagram (ERD) Solution! All Entity Relationship Diagram examples were designed and saved for ConceptDraw DIAGRAM users. Now they are available from ConceptDraw STORE.
Picture: Entity Relationship Diagram Examples
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When creating ER diagrams, you can apply different color ER diagram styles and also notation styles. ConceptDraw DIAGRAM enhanced with Entity-Relationship Diagram (ERD) Solution gives the ability to draw visual and attractive ER Diagrams using the style icons from Crow’s Foot notation and Chen's notation professionally designed and offered by ERD Chen's Notation and ERD Crow’s Foot Notation libraries.
Picture: ER Diagram Styles
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The Accounting flowchart shows how information flows from source documents through the accounting records. The are based on the accounting procedures or processes.
Flowcharts are used to represent accounting information in a system. There are special symbols which are used to create accounting flowcharts. Try conceptdraw flowcharting set of symbols to draw a professional charts.
Picture: Why Flowchart Important to Accounting Information System?
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While creating flowcharts and process flow diagrams, you should use special objects to define different statements, so anyone aware of flowcharts can get your scheme right. There is a short and an extended list of basic flowchart symbols and their meaning. Basic flowchart symbols include terminator objects, rectangles for describing steps of a process, diamonds representing appearing conditions and questions and parallelograms to show incoming data.
This diagram gives a general review of the standard symbols that are used when creating flowcharts and process flow diagrams. The practice of using a set of standard flowchart symbols was admitted in order to make flowcharts and other process flow diagrams created by any person properly understandable by other people. The flowchart symbols depict different kinds of actions and phases in a process. The sequence of the actions, and the relationships between them are shown by special lines and arrows. There are a large number of flowchart symbols. Which of them can be used in the particular diagram depends on its type. For instance, some symbols used in data flow diagrams usually are not used in the process flowcharts. Business process system use exactly these flowchart symbols.
Picture: Flowchart Symbols: Meaning and Examples
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This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Seven Management and Planning Tools Solution from the Business Productivity area of ConceptDraw Solution Park.
This sample shows the Property Management matrix, the ideas are ordered in regards to importance and frequency. This matrix gives the ability to turn the theory into quantifiable data.
Picture: Property Management Examples
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Database design is an important part of any project, as databases become more and more complex nowadays. To make the model more representative, entity relationship diagrams are widely used in software engineering area. These diagrams show sets of entities as rectangles connected via lines labeled with their cardinalities.
This an example of the ER-diagram developed to store information regarding some online role-playing game. It includes three main elements of ER diagram: entities, relationships and attributes. The entities, attributes and relationships on this ER-diagram is depicted according to the Chen's notation. Chen's notation for Entity Relationship diagrams admits using of rectangles to depict entities, ovals for attributes and ,at least, diamonds to show relationships. ConceptDraw Entity-Relationship Diagrams solution was applied as ERD software to create this diagram.
Picture: ConceptDraw DIAGRAM ER Diagram Tool
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