SDLC
There are five phases of the systems development life cycle - Planning Phase, Analysis Phase, Design Phase, Implementation Phase and Support Phase. System Designer deals with all phases of the SDLC to deliver final system with all the agreed constraints in time and cost. Planning phase is accomplished using Gantt chart and PERT chart or other project management software.
Feasibility is measure of suitability of system development for concerned organization. In feasibility assessment, operational, schedule, technical and economic criteria is analyzed to check the capability of firm to deliver the system.
Data and information gathering techniques helps in ensuring the accuracy of feasibility assessment whether system is able to meet all the functional and technical requirements. There are six identified techniques for data and information gathering which is reviewing the existing document, observing the existing system and user input, preparing the questionnaire to understand the requirement, Interview with expert panel and management review committee, Joint Application Design (JAD) system and research to find the suitability and solution of system.
Documentation keeps track of management, knowledge bank, testing, data and information. It summarizes the project deliverable's steps by including technical documents, project schedule, project reports, diagram for any system or data flow, chart of data model, project design and details of other deliverables as required in project.
The planning phase can be defined as formal steps of project development, design, execution plan, schedule and risk assessment in specified textual document which is approved by management committee and works as guideline and checklist to control and manage the project whereas analysis phase does the primary and detailed investigation and analysis.