17/09/2019 10:06:09 AM

Bài viết sưu tầm

Systems Development Life Cycle

Systems Development Life Cycle_sdlc

Objective

This section gives students the concepts of system development life cycle and the phases of system development life cycle. In addition, learner can be known the details of steps in phases and the outputs of each phase.

1. What is the system development life cycle?

The systems development life cycle (SDLC) is a conceptual model used in project management that describes the stages involved in an information system development project, from an initial feasibility study through maintenance of the completed application.

2. Systems development life cycle phases

The SDLC is composed of four fundamental phases:

Planning
Analysis
Design
Implementation

Phase	Step	Technique	Deliverable
Planning Focus: Why build this system? How to structure the project? Primary Outputs: - System Request with Feasibility Study. - Project Plan.	Identify Opportunity	Project Identification	System Request
	Analyze Feasibility	Technical Feasibility Economic Feasibility Organizational Feasibility	Feasibility Analysis
	Develop Workplan	Time Estimation Timeboxing Task Identification Work Breakdown Structure Pert Chart GANTT Chart Scope Management	Project Plan - Workplan
	Staff Project	Project Staffing Project Charter	Staffing Plan
	Control and Direct Project	CASE Repository Standards Documentation Risk Management	Standards List Risk Assessment
Analysis Focus: Who, what, where and when for this system? Primary Output: System Proposal.	Develop Analysis Strategy	Business Process Automation Business Process Improvement Business Process Reengineering	System Proposal
	Determine Business Requirements	Interview JAD session Questionnaire Document Analysis Observation	Requirements Definition
	Create Use Cases	Use-Case Analysis	Use Cases
	Model Processes	Data Flow Diagramming	Process Models
	Model Data	Entity Relationship Modeling Normalization	Data Model
Design Focus: How will this system work? Primary Output: System Specification.	Design Physical System	Design Strategy	Alternative Matrix System Specification
	Design Architecture	Architecture Design Hardware & Software Selection	Architecture Report Hardware & Software Specification
	Design Interface	Use Scenario Interface Structure Interface Standards Interface Propotype Interface Evaluation	Interface Design
	Design Databases and Files	Data Format Selection Entity Relationship Modeling Denormalization Performance Tuning Size Estimation	Data & File Specification Physical Data Model
	Design Programs	Data Flow Diagramming Program Structure Chart Program Specification	Physical Process Model Program Design
Implementation Focus: Delivery and support of completed system. Primary Output: Installed System.	Construct System	Programming Software Testing Performance Testing	Test Plan Programs Documentation Migration Plan
	Install System	Conversion Strategy Selection Training	Conversion Plan Business Contingency Plan Training Plan
	Maintain System	Support Selection System Maintenance Project Assessment	Support Plan Problem Report Change Request
	Post-implementation	Post-implementation Audit	Post-implementation Audit Report