Page 10 - DCAP305_PRINCIPLES_OF_SOFTWARE_ENGINEERING

Principles of Software Engineering

Notes Programming languages started to appear in the 1950s and this was also
another major step in abstraction and also assumed as the base of the software
engineering.

1.2 Evolution and Impact

We temporarily review how the software engineering discipline has gradually come into
existence, preliminary with a modest beginning about five decades ago. We also point out that
in malice of all shortcoming of this regulation; it is the best gamble to apply for a solution to
the software crisis.
1.2.1 Program versus Software

Software is in excess of programs. It consists of programs; documentation of any surface of the
program and the procedures used to setup and operate the software system. The components
of the software systems are shown in Figure. 1.1.
Software = Programs + Documentation + Operating procedures

Figure 1.1: Components of Software

Programs

Operating
Documentation
procedures

Any program is a subset of software and it becomes software only if documentation and
functioning. Procedure manuals are ready. Program is a grouping of source code and object
code. Documentation consists of different types of manuals as shown in Figure. 1.2.

Figure 1.2: List of Documentation Manuals

Formal specification
Analysis\ Context-Diagram
Specification
Data flow diagrams
Flow charts
Design

Entity-Relationship diagrams
Documentation
manuals
Source code listings
Implementation
Cross-Reference listing
Test data
Testing

Test results

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