Systems Analysis: Requirements, Decomposition, and Modeling

Posted by on Feb 13, 2025 in Creation and Design | 0 comments

Systems Analysis: Decomposition and Requirements

Systems analysis involves decomposing a system into components for individual study and understanding their interactions. The goal is to produce a requirements document that describes what the future system should do, focusing on what rather than how. Requirements analysis is the process of thoroughly studying these requirements.

Prerequisites: Defining Requirements

A requirement is defined as a condition or capability needed by a user to solve a problem

Read More

Entity Relationship Model: Attributes, Entities, and Relationships

Posted by on Jan 21, 2025 in Creation and Design | 0 comments

ER Model: Attributes, Entities, and Relationships

Attribute Definitions

  • Composite Attribute: An attribute composed of multiple components. Example: Full Name (First Name, Last Name).
  • Derived Attribute: An attribute calculated from other attributes. Example: Age (from Date of Birth).
  • Single-Valued Attribute: An attribute with only one value. Example: Social Security Number.
  • Multivalued Attribute: An attribute with multiple values. Example: Phone Numbers.
  • Simple Attribute: An attribute that cannot
Read More