Quiz 1 Finals (Part 3) Flashcards
The use of several tools in structured analysis:
- DFD
- Data Dictionary
- Structured English
- Decision Trees
- Decision Tables
is about understanding situations, not solving problems. effective analysts therefore emphasize investigation and questioning to learn how a system currently operates and to identify the requirements users have for a new or modified one.
System Analysis
involves studying the current business system to find out how it works and where improvements should be made.
System Requirement Determination
is a feature that must be included in a new system. it may be a way of capturing or processing data, producing information, controlling a business activity or supporting management
Requirements
Activities in Requirements determination.
Three Major Activities:
- Requirements Anticipation
- Requirements Investigation
- Requirement Specification
When a systems analyst has experience in a particular business area or a similar environment, it can help them anticipate the needs and potential problems of a new system.
Requirement Anticipation
it involves various tools and skills used by analysts to study the current system and document its feature for further analysis. (This activity is at the heart of systems analysis)
Requirement Investigation
it relies on fact-finding techniques and includes methods for documenting and describing system features.
Requirement Investigation
the data produced during the fact-finding investigation are analyzed to determine requirements specifications and the descriptions of features for a new system.
Requirement Specification
The data collected during the fact-finding study and included in data flow and decision analysis documentation are examined to determine how well the system is performing and whether it will meet the organizations demands.
Analysis of Factual Data
Requirement Specification.
Three Interrelated Parts:
- Analysis of Factual Data
- Identification of Essential Requirements
- Selection of requirements fulfillment strategies
the methods that will be used to achieve the stated requirements are selected. these form the basis for system design, which follows requirements specifications.
Selection of Requirement fulfillment strategies
Features that must be included in a new system, ranging from operational details to performance criteria, are specified.
Identification of essential requirements
Basic Requirements.
Analysts structure their investigation by seeking answers to these four major questions:
- What is the basic business process?
- what data are used or produced during that process ?
- what are the limits imposed by time and the volume of work?
- What Performance control are used?