Requirements analysis phase
The critieria is based on what other techniques you might employ. The waterfall method in SDLC (software development life cycle) has been largely discounted in favor of more effective methods, such as the iterative approach. One of the main problems with the waterfall design is that it does not easily allow for negative feedback at several stages of the project (for example, water flows downhill, not uphill, so feedback into the cycle can be very costly).
for gathering data and information.
There are 2 main methods of software modeling · Predictive(e.g.waterfall) - Good when requirements are well understood and have low technical risk. · Adaptive(e.g.spiral) - Good when requirements and needs are uncertain. High technical risk In a failure - In a predictive LC it will be expensive because we get to know the failure after finishing everything but in adaptive LC only an iteration is wasted. There several phases in the waterfall model a. Planning b. Requirements c. Specification (b and c together we call analysis) d. Design e. Implementation f. Maintenance This is called a Functional Decomposition and also a top down approach (Where we see from above and identify the big picture first and then go in to higher details) In the waterfall model, before going to the next phase we have to freeze the previous step (no turning back). This is good when we have a good understanding about the project at the beginning. But iterative models gives us more flexibility through giving chance to revisit early phases. Spiral model is a adaptive model. This is an adaptive SDLC that cycles over and over again through development activities until project is complete. Here we go through some major steps, 1. Plan 2. Analyze and Design 3. Construct prototype 4. Test and integrate These steps iterate till completion of the project. This is also can be viewed as a divide and conquer approach. In first few iterations complex or risky parts of the system are handled.
time consuming, cost increasing,large number of information nessary to collected
Requirements well understood and well defined and have low technical risk.
SDLC refers to a stage all systems naturally undergo, a methodology refers to an approach invented by humans to manage the events naturally occurring in the SDLC
An administrator in SDLC, or System Development LifeCycle, implements the system, which can include installation and updating the system. One role of the administrator is to do maintenance activities that include preventative, corrective, and adaptive maintenance.
The five phases of the Software Development Life Cycle (SDLC) are: Requirements gathering, Planning, Design, Implementation, and Maintenance. These phases guide the development process from initial concept to final product delivery, ensuring a structured approach to software development. Each phase contributes to the overall success of the project by systematically managing tasks and resources.
Requirements analysis phase
advantages and drowbacks of following a life cycle approach to information system development?
DFD SDLC primary key unique key etc......... study DBMS very well and ur project
The reason why you might not find differences in the sdlc and rad is because RAD is a more sped-up version of the SDLC. RAD is typically used in small to medium size projects, while the SDLC is generally used for large projects. Another difference is that in the SDLC, one can control the scope creep of the project, whereas that is very limited when one implements RAD because you give it up for faster implementation times. In RAD you have alot of feedback from the user to refine the program more to the aspects of the user, whereas you dont get the same user input in the SDLC. This feedback loop is another reason that RAD is sometimes chosen over the SDLC
The stage in SDLC where a problem is identified and defined is typically the requirements gathering phase. This is where stakeholders discuss and outline their needs, goals, and objectives for the project. By defining the problem in this phase, it sets the foundation for the development process to address and solve it effectively.
SDLC has both verification and validation activities where as STLC has only validation activity. Simply STLC is a part of SDLC
explain spiral model in sdlc
SDLC stages by taking example of EDP department SDLC stages by taking example of EDP department