what is systems development lifestyle?

Question

what is systems development lifestyle and discuss any two most populer systems develpement techniques used in the market today.

Answer 1

System Development Life Cycle, or SDLC, is defined by the United States Department of Justice as a software development process, although it is also a distinct process independent of software or other Information Technology considerations. It is used by a systems analyst to develop an information system, including requirements, validation, training, and user ownership through investigation, analysis, design, implementation and maintenance. SDLC is also known as information systems development or application development. An SDLC should result in a high quality system that meets or exceeds customer expectations, within time and cost estimates, works effectively and efficiently in the current and planned information technology infrastructure, and is cheap to maintain and cost-effective to enhance. SDLC is a systems approach to problem solving and is made up of several phases, each comprised of multiple steps:

The software concept - identifies and defines a need for the new system
A requirements analysis - analyzes the information needs of the end users
The architectural design - creates a blueprint for the design with the necessary specifications for the hardware, software, people and data resources
Coding and debugging - creates and programs the final system
System testing - evaluates the system's actual functionality in relation to expected or intended functionality.
The six official phases are:

Preliminary Investigation
Systems Analysis
Systems Design
Systems Development
Systems Implementation
Systems Maintenance
The general phases are:

Feasibility Study
Analysis
Design
Implementation
Testing
Evaluation
Or:

Feasibility Study
Analysis
Design
Development
Implementation
Maintenance
Or:

Feasibility Study
Analysis
Design
Implementation
Maintenance

Answer 2

A software development process is a structure imposed on the development of a software product. Synonyms include software life cycle and software process. There are several models for such processes, each describing approaches to a variety of tasks or activities that take place during the process.

Process Models
3.1 Waterfall processes
3.2 Iterative processes
3.3 Formal methods

Waterfall and Iterative are the two popular used. Fro small projects waterfall is k. But now its the time for ietrative model. with time requirements constsantly change and u cannot dod everythign at one time..