Chapter 3 Flashcards
What are the 4 phases of Systems Development Cycle or Project Life Cycle?
Phase A: Conception phase
Phase B: Definition phase
Phase C: Execution phase
Phase D: Operation phase
What is the System Life Cycle?
- Development/Installation
- Operation
- Enhancement, Replacement, or Termination
The Stakeholders in Systems Development Cycle
- Client
- for whom the project is being done
- pays for project
- has needs and requirements to be met - User/Customer
- operates or a beneficiary of project end-item
- might be the same as a customer - System Development Organisation (SDC)
- performs work for the customer
- aka developer, contractor, consultant
Describe what occurs during Phase A of the Systems Development Cycle
Phase A: CONCEPTION
- perceived need or problem
- initial screening or feasibility study; alternative solutions
- proposal
- concept approval or rejection
Describe what occurs during Phase B of the Systems Development Cycle
Phase B: DEFINITON
- specify requirements in detail: user requirements and system requirements
- define project to produce end-item/deliver requirements: project master plan
Describe what occurs during Phase C of the Systems Development Cycle
Phase C: EXECUTION
- design/development
- procurement/fabrication
- production/building
- installation
Describe what occurs during Phase D of the Systems Development Cycle
Phase D: OPERATION
- customer gains control
- system developer might remain involved through maintenance, enhancement or replacement
What is Phased Project Planning?
the stepwise fashion in which phases and stages in project life cycle are sometimes undertaken
Fast tracking in Phased Project Planning
Phases tend to overlap so work in successive phases happens simultaneously
Pro: Shorten project life span
Con: Increased risk of a mistake
What do you look into during the ‘initial investigation’ in Phase A?
- environment
- needs, symptoms, problem definition, and objectives
- prelim solutions and estimated costs
- benefits, strengths and weaknesses of each solution
- affected individuals and organisations
Decision Criteria to proceed with a project (occurs in Phase A)
- needs are real
- funding is available
- project is consistent with goals and resources of organisation
- project has priority with respect to other needs
- project has value (new technology, organisational reputation, market share, profit etc)
Feasibility assessment
the process of studying a need, problem, and solution in sufficient detail to determine if an idea is economically viable and worth developing
could be done in-house, or outsourced if specialised information is needed
When is a project viable?
if concept is something that customer can handle itself: if it is passed along to an internal group for development and execution
if concept cannot be executed internally: given to outside contractors (SDOs)
Steps in the feasibility study
1) Gain full understanding of user’s problem, need and current situation
2) Document current system –> systematic diagrams and summarise all information collected
3) Formulate alternative solutions
4) Analyse alternatives –> use models to assess the ability to meet user criteria
5) Include solution in proposal
6) Feasibility involves analysis of environmental impact
What is a Request for Proposal (RFP)?
A document sent by a customer to potential contractors explaining the problems, objectives and requirements