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SDLC

            Black box testing is testing without knowledge of the internal workings of the item being tested. For example, when black box testing is applied to software engineering, the tester would only know the "legal" inputs and what the expected outputs should be, but not how the program actually arrives at those outputs.
             A software testing technique whereby explicit knowledge of the internal workings of the item being tested are used to select the test data. Unlike black box testing, white box testing uses specific knowledge of programming code to examine outputs. The test is accurate only if the tester knows what the program is supposed to do. He or she can then see if the program diverges from its intended goal.
             Black box testing maps a set of specific inputs to a set of expected outputs. An equivalence category is a collection of input sets. Two input sets belong to the same equivalence category if there is no reason to believe that if one works the other will not.
             Therefore testing one input set essentially tests the entire category. .
             Black Box Testing:.
             1. Equivalence Partitioning - Because exhaustive black box testing is not feasible, black box test cases must be chosen to find different faults if possible. We can assume that similar inputs will result in similar responses, allowing the grouping of inputs into equivalence classes. In equivalence partitioning, only one or a few test cases are chosen to represent the entire equivalence classes.
             Input data should be divided into equivalence classes based on consideration based of:-.
             - valid vs invalid input values.
             - valid vs invalid output values.
             - similarity and difference of input values.
             - similarity and difference of output values.
             - similarity and difference of expected processing.
             2. Boundary Value Analysis - Black box test cases must be chosen to maximize the chance of finding faults. Experience has shown that values at or near equivalence class boundaries are more likely to detect faults.


Essays Related to SDLC

1. ANALYSIS ON VASA CAPASIZES

Typically, the process of the development of information systems project can be divided into five different phases, which is known as the systems development life cycle or SDLC, including system planing and investigation, analysis, design, implementation, and maintenance and review. ... We will talk about major pitfalls the Vasa Capasizes case, provide a brief introduction to objectives and tasks of each phase in SDLC and make an analogy to show how similar mistakes may occur in information systems development. 1. ... SDLC in Information Systems Development As we have mentioned at the be...

  • Word Count: 903
  • Approx Pages: 4

2. System Development Life Cycle

http://www.worc.ac.uk/LTMain/Rowland/HNDSpring2003/Session04/notes.html Feb 11th, 2003 1.5.1 System Analysis: Define what constitutes a solution to the problem 1.5.2 System Design: identify in detail how the system will be constructed 1.5.3 System Development: Maintain System 1.5.4 System Implementation: Write the program & procedures; Install & test system 1.5.5 System Operation: Make sure the system work well http://www.mckinnonsc.vic.edu.au/la/it/ipmnotes/sdlc/htm 1.6.1 System Analysis: Define what constitutes a solution to the problem 1.6.2 System Design: identify in detai...

  • Word Count: 1215
  • Approx Pages: 5
  • Grade Level: High School

3. A Case Study of Technology Project

SDLC (Systems Development Life Cycle) The Life Cycle for this particular project did not exactly match the order of the phases as described in the Systems Development Life Cycle concept. ... System Concept Development Phase In this phase of SDLC, the business need has been approved and the approaches for accomplishing the concept are reviewed for feasibility and appropriateness. ... Conclusion The project as a whole went through a couple of cycles of the SDLC due to different implementations. ...

  • Word Count: 1364
  • Approx Pages: 5
  • Grade Level: Undergraduate

4. A Case Study Of A Technology Project

Analyzing the System Concept Development Phase In this phase of SDLC, the business need has been approved and the approaches for accomplishing the concept are reviewed for feasibility and appropriateness. ... Conclusion The project as a whole went through a couple of cycles of the SDLC due to different implementations. ...

  • Word Count: 1316
  • Approx Pages: 5
  • Has Bibliography
  • Grade Level: Undergraduate

5. Enterprise-Level Business System

When looking at an enterprise-level business system there are quite a few key areas that should be reviewed. Often when looking at early stages of the system usually in regards to the System Development Life Cycle (SDLC) it can be very inefficient and costly if not done correctly. In looking to addr...

  • Word Count: 1065
  • Approx Pages: 4
  • Has Bibliography
  • Grade Level: Undergraduate

6. An approach to systems development that would minimise the c

The Waterfall model formally also known as System Development Life Cycle (SDLC) Was much beloved in the early days of software engineering and still dominates some government procurement projects' (Neilsen, 2001). ... The same phases that are followed in the traditional SDLC are also followed in RAD, but the phases are shortened and combined with each other to produce a more streamlined development technique. ...

  • Word Count: 3063
  • Approx Pages: 12
  • Grade Level: Undergraduate

7. Proposed Automated Order Entry System

Team B has been organized to research the market for a favorable automated order entry system and to use the SDLC process for the integration of that process within the company's infrastructure. ...

  • Word Count: 2432
  • Approx Pages: 10
  • Has Bibliography
  • Grade Level: Undergraduate

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