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Questions and Answers
Where are all the conditions to be checked listed in a Decision Table?
In a Decision Table, where are the actions outlined that need to be carried out?
Which quadrant of a Decision Table provides answers to questions from the Condition Stub?
Where is the appropriate action resulting from the condition entries indicated in a Decision Table?
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In a Decision Table, what does a blank against an action state?
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What does an X (or check mark) against an action indicate in a Decision Table?
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When is Structured English best used?
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What does Pseudocode specify in programming logic?
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Study Notes
Ideal SRS Document Characteristics
- Should be complete, unambiguous, and devoid of jargon.
- Needs to specify operational, tactical, and strategic information requirements.
- Aims to resolve disputes between users and analysts.
- Utilizes graphical aids to enhance understanding and design.
Interviewing Techniques
- Unstructured Interviews: Informal sessions to gather basic system information through open questions.
- Structured Interviews: Comprise standard questions, requiring responses that may be closed (objective) or open (descriptive).
Advantages of Interviewing
- Best source for qualitative information.
- Useful for individuals lacking effective written communication skills.
- Allows for immediate validation and cross-checking of information.
- Capable of addressing complex subjects.
- Facilitates discovery of key issues via user opinions.
- Bridges gaps in understanding, reducing future problems.
Questionnaires
- Open-ended Questionnaires: Easy to interpret, exploring problems towards specific answers.
- Closed-ended Questionnaires: Standardized responses are provided; responses are mutually exclusive.
Advantages of Questionnaires
- Effective in surveying users’ interests and beliefs across different locations.
- Determines the overall opinion prior to directing system development.
- High reliability and confidentiality of responses.
- Suitable for factual data collection, easily distributed electronically or via postal service.
Review of Records, Procedures, and Forms
- Aids in gaining organizational knowledge before advising others.
- Enables rapid documentation of current operations via procedure manuals and forms.
- Clarifies transactions within the organization, assisting in performance evaluation.
- Helps analysts understand operations needing support, detailing problems and solutions.
Observation
- Direct method to collect information about systems.
- Validates whether project deadlines are realistic and achievable.
Structured Analysis Overview
- Specifies application presentations graphically.
- Divides processes for clear system flow representation.
- Focuses on logical structures rather than physical implementations.
- Follows a top-down approach from high-level overviews to detailed specifics.
Structured Analysis Tools
- Data Flow Diagrams (DFD)
- Data Dictionary
- Decision Trees
- Decision Tables
- Structured English
- Pseudocode
Data Flow Diagrams (DFD)
- Illustrates data flow between system functions, detailing current system implementation.
- Acts as an initial design phase tool, breaking requirement specifications down functionally.
- Serves as an effective communication tool between users and analysts/system designers.
Types of DFD
- Physical DFD: Implementation-dependent, outlining which functions are performed.
- Logical DFD: Implementation-independent, focusing solely on data flow between processes.
Context Diagram
- Provides an overview of the entire system with a single DFD.
- Starts from major processes and gradually adds details using a top-down approach.
Data Dictionary
- Structured repository of system data elements, defining and describing DFD components.
- Enhances communication between analysts and users, crucial for database building.
Decision Trees
- Define complex relationships through decisions, illustrated in a horizontal tree format.
- Diagrams illustrate alternative actions and conditions.
Decision Tables
- Useful for situations where actions depend on combinations of independent conditions.
- Serves as a matrix defining problems and possible actions based on defined conditions.
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Description
Test your knowledge about tools used in Structured Analysis, which is a method that specifies the presentation and flow of a system. Understand its attributes like logical design, process division, and vendor-independence.
