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Six Logical Components of a Legacy System

publish date: 2026/06/23 19:43:5.430276 UTC

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Match each legacy system component to its correct description.

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Component

Application data
System hardware
Business policies and rules
Support software
Business processes
Application software

Description

Processes used to achieve a business objective, such as issuing an insurance policy
Data processed by the application system, often inconsistent and duplicated across multiple files
Operating system, utilities, and compilers needed to run and develop the system, which may be obsolete
The collection of application programs providing business services, developed at different times
Hardware that may no longer be available or compatible with current IT purchasing policies
Definitions of how the business should be carried out and constraints on the business

Correct Answer

(1) System hardware,Hardware that may no longer be available or compatible with current IT purchasing policies
(2) Support software,Operating system, utilities, and compilers needed to run and develop the system, which may be obsolete
(3) Application software,The collection of application programs providing business services, developed at different times
(4) Application data,Data processed by the application system, often inconsistent and duplicated across multiple files
(5) Business processes,Processes used to achieve a business objective, such as issuing an insurance policy
(6) Business policies and rules,Definitions of how the business should be carried out and constraints on the business

Explanation

A legacy system has six logical components: system hardware, support software, application software, application data, business processes, and business policies and rules. Each plays a distinct role and they are interconnected through dependency relationships.

Reference

Software Engineering, Ian Sommerville, 10th edition

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