1.1.1 - Identify the context for which a new system is planned. Flashcards
What is the Systems Life Cycle?
The Systems Life Cycle refers to the stages in which the development of a new system passes through. Most SDLC’s will begin with an analysis of the existing system (if one is in place) before planning commences.
New systems are normally a replacement for…
New systems are normally replacements for a less efficient system that came before.
What should be considered when planning for a new system?
The context should be considered when planning for a new system.
Give 4 reasons why a system may be replaced.
The old system could be inefficient, no longer fit for purpose, outdated or redundant.
What can a system include?
The system can include hardware, software, the people working it and the immediate environment.
What are the two important considerations of a new system’s context?
Extent and limitations of the new and current system.
What is the purpose of a systems analyst?
They design, evaluate and investigate systems (hardware, software etc) for a client.
A systems analyst will try to document how an existing system works through ___________. Give 4 ways how this can be done.
Observation; this can be done using surveys, interviewing users, observing them or tracing how information is handled by looking at documents produced by it.
Why do systems analysts evaluate old systems?
They evaluate the old system (they look at what works well and what doesn’t) in order to design a more productive system.
Give 5 questions (factors) that should be considered when designing a new system.
1) What existing infrastructure from the existing system can be used?
2) What requirements on hardware and software will the new system have?
3) What permissions are required?
4) Are there any ethical issues, such as redundancy of workers?
5) Will people need retraining or upskilling?
What is a feasibility study?
A feasibility study evaluates and analyses a project and its potential, to decide whether or not the project should be pursued, based on certain criteria (TELOS).
Explain what TELOS signifies.
Technical: whether the existing technology is sufficient to implement the system.
Economical: whether the proposed system is cost effective.
Legal: whether the proposed system conflicts any laws/regulations.
Operational - whether existing operational practices and proceeds are sufficient to support the maintenance and operation of the new system.
Scheduling - how long it will take to implement the new system.
